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Chemical Process MCQ Questions & Answers

Chemical Process MCQs : This section focuses on the "Chemical Process". These Multiple Choice Questions (MCQs) should be practiced to improve the Chemical Process skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

__________ process is used for the manufacture of sodium carbonate by ammonia soda process.

A. Ostwald's
B. Bosch
C. Solvay
D. Haber's

View Answer

Question 2

All enzymes are made of

A. fats
B. carbohydrates
C. proteins
D. amino acids

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Question 3

Claude process of gas liquefaction employs

A. merely compression of gas beyond its critical pressure.
B. Joule-Thomson expansion cooling.
C. heat exchange with colder stream.
D. adiabatic expansion against a piston or in a turbine.

View Answer

Question 4

Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.

A. CaO
B. MnO2
C. ZnO
D. FeS

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Question 5

Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.

A. 10
B. 25
C. 50
D. 98

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Question 6

Epoxy resin

A. is a good adhesive.
B. is an elastomer.
C. cannot be used for surface coatings.
D. is a polyester.

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Question 7

Esterification reaction

A. produces soap.
B. is reversible.
C. is a reaction between an alcohol and an organic acid.
D. all (a), (b) and (c).

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Question 8

Esterification reaction produces

A. detergent
B. vanaspati
C. soap
D. mercaptans

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Question 9

Frasch process is for

A. making oxygen
B. producing helium
C. mining sulphur
D. making nitrogen

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Question 10

Fusel oil is a/an

A. essential oil.
B. extract from medicinal herbs.
C. mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses).
D. none of these.

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Question 11

Fusion of bauxite and __________ produces high alumina cement.

A. alum
B. limestone
C. coke
D. quartz

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Question 12

Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of

A. callagen
B. tannin
C. molasses
D. carbohydrate

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Question 13

Gun powder, which is an explosive comprises of charcoal, sulphur and

A. glycerene
B. salt petre
C. nitro glycerene
D. dynamite

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Question 14

Haemoglobin is a/an

A. amino acid
B. biological catalyst
C. protein
D. enezyme

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Question 15

Hard water

A. does not affect the lather formation by soap.
B. is not unfit for drinking purpose.
C. pollutes the water stream.
D. all (a), (b) and (c).

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Question 16

In sulphate pulp manufacture, the pressure and temperature in the digestor is

A. 10 atm., 800 °C
B. 10 atm., 170-180°C
C. 1 atm., 170 - 180°C
D. l atm., 800°C

View Answer

Question 17

In the Lurgi coal gasifier

A. coking coals cannot be used.
B. low carbon conversion efficiency is achieved.
C. entrainment of solids is higher.
D. large quantity of coal can be processed.

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Question 18

Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its

A. poor oxidation stability and high gum forming tendency.
B. greater tendency of decomposition at elevated temperature.
C. hydrolysis tendency in presence of water.
D. all (a), (b) and (c).

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Question 19

Neon gas is

A. flammable in nature.
B. used in color discharge tube.
C. filled in lamps having tungsten filament.
D. all (a), (b) and (c).

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Question 20

Neoprene is the trade name of

A. polyurathane
B. phenol formaldehyde
C. polychloroprene
D. styrene-butadiene rubber

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Question 21

Oxidation of SO2 to SO3 is favoured by

A. low temperature and low pressure.
B. low temperature and high pressure.
C. high temperature and low pressure.
D. high temperature and high pressure.

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Question 22

Paper pulp produced by kraft/sulphate process is

A. bleached easily
B. dull white in color
C. strong fibrous
D. dark colored

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Question 23

Pasteurisation of milk means

A. removal of fatty and albuminous substance from it.
B. killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics.
C. inhibiting the growth of micro-organisms without killing them.
D. none of these.

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Question 24

Phosphate rock is a raw material for the manufacture of

A. phosphoric acid
B. phosphorous
C. superphosphates
D. all (a), (b) and (c)

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Question 25

Pick out the endothermic reaction out of the following.

A. C+O2 = CO
B. CO + 3H2 = CH4 + H2O
C. CaCO3 = CaO + CO2
D. CO +O2 = CO2

View Answer

Question 26

Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because

A. its calorific value is very less.
B. tar neutralises the residual acids present in pitch.
C. it reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop.
D. all (a), (b) and (c).

View Answer

Question 27

Polycaprolactum is commercially known as

A. nylon-6
B. nylon-66
C. dacron
D. rayon

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Question 28

Producer gas consists mainly of

A. CO, CO2 N2, H2
B. CO, H2
C. H2, CH4
D. C2H2, CO2, H2

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Question 29

Raw materials used for producing __________ cement does not contain iron oxide.

A. waterproof
B. slag
C. white
D. pozzolan

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Question 30

Salt cake is chemically represented by

A. Na2SO4
B. CaSO4.H2O
C. MgSO4
D. BaSO4

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Question 31

Starting raw material for the manufacture of alum is

A. alumina
B. gypsum
C. bauxite
D. ammonium bicarbonate

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Question 32

Styrene is produced from ethyl benzene by the process of

A. dehydrogenation
B. oxidation
C. alkylation
D. dehydration

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Question 33

Styrene-butadiene-rubber (SBR) as compared to natural rubber has

A. Poorer tensile strength.
B. poorer resistance to oxidation.
C. greater amount of heat build-up under heavy loading.
D. all (a), (b) and (c).

View Answer

Question 34

Sucrose content in the raw juice extracted from sugar cane is about __________ percent.

A. 01-Feb
B. 15 - 20
C. 50 - 60
D. 80 - 85

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Question 35

Sulphur addition in soap is done to

A. improve the soap texture.
B. cure pimples & dandruff.
C. fasten lather formation.
D. increase its cleansing action.

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Question 36

The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is

A. dilute H2SO4
B. oleum
C. ultraviolet light
D. none of these

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Question 37

The chamber process is

A. preferred over contact process for producing 98 to 100% H2SO4 and various oleums.
B. non-catalytic and operates only on pyrites.
C. a batch process for directly producing high strength (98 to 100%) H2SO4.
D. none of these.

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Question 38

The combustion reaction, C + O2 = CO2, is

A. exothermic
B. endothermic
C. autocatalytic
D. none of these

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Question 39

The drug used in contraceptives is

A. sulphadizene
B. mestranol
C. methyl salicylate
D. pencillin

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Question 40

The gasification reaction represented by, C + H2O = CO + H2, is a/an __________ reaction.

A. exothermic
B. endothermic
C. catalytic
D. autocatalytic

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Question 41

The main use of HCl is in the

A. drilling of petroleum wells and pickling of steel sheets.
B. manufacture of cationic detergent.
C. treatment of spent fuel of nuclear reactor.
D. none of these.

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Question 42

Very fine suspended and colloidal impurities are removed from water by a process called

A. sedimentation
B. coagulation
C. disinfection
D. softening

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Question 43

Viscose rayon is chemically

A. cellulose nitrate
B. regenerated cellulose nitrate
C. cellulose acetate
D. regenerated cellulose acetate

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Question 44

Which is the main reducing agent during production of iron from iron ore in a blast furnace ?

A. C
B. CO
C. CO2
D. H2

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Question 45

Which of the following is an organo-metal-lic compound ?

A. Isopropyl alcohol
B. Tetra-ethyl lead
C. Zeolite
D. Cumene

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Question 46

Which of the following is not a raw material used for the manufacture of ordinary glass?

A. Iron oxide
B. Soda ash
C. Limestone
D. Silica

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Question 47

Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?

A. High cost of mercury.
B. High specific gravity of mercury.
C. Non-availability of high purity mercury.
D. Pollution of water stream by mercury.

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Question 48

Which of the following sugars is the sweetest?

A. Glucose
B. Fructose
C. Sucrose
D. Lactose

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Question 49

Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials.

A. adsorbs
B. oxidises
C. reduces
D. converts

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Question 50

Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of

A. calcium sulphate
B. sodium chloride
C. sodium sulphate
D. magnesium chloride.

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Question 51

A mixture of chlorine & sodium bromide acts as a/an

A. Insecticides
B. Analgesic drug
C. Fire retardant
D. Hydrogenation catalyst

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Question 52

__________ are used as corrosion inhibitor for iron & steel in aqueous solutions.

A. Phosphates
B. Chromates
C. Sulphates
D. Bi-carbonates

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Question 53

Hydrazine (N₂H₄) is used mainly as a/an

A. Explosive
B. Rocket fuel
C. Detergents additive
D. None of these

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Question 54

Common salt is generally not produced commonly by __________ method from brine.

A. Freeze drying
B. Electrolytic
C. Solar evaporation
D. Vacuum evaporation

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Question 55

Sugar content in sugarcane on cane basis is about __________ percent by weight.

A. 1 to 5
B. 5 to 10
C. 15 to 20
D. 20 to 30

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Question 56

Paper grade bamboo contains about __________ percent cellulose.

A. 5
B. 20
C. 40
D. 60

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Question 57

Production of one ton of cement requires about __________ tons of limestone.

A. 0.6
B. 1.2
C. 2.2
D. 3.8

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Question 58

Which of the following paper does not require a filler during manufacture?

A. Bond paper
B. Writing paper
C. Blotting paper
D. Coloured paper

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Question 59

Fish contains about __________ percent oil.

A. 5
B. 10
C. 20
D. 35

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Question 60

Phenolic antiseptics are added in the __________ soap.

A. Shaving
B. Medicated
C. Metallic
D. Transparent

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Question 61

Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of

A. Nitric acid
B. Hydrochloric acid
C. Methyl alcohol
D. Formic acid

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Question 62

Oxygen is produced by fractionation of air using __________ process.

A. Linde's
B. Claude's
C. Either A or B
D. None of these

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Question 63

Pick out the wrong statement.

A. Conversion of SO₂ to SO₃ in Monsanto-4 pass converter is about 98%
B. The chemical formula of oleum is H₂S₂O₇, which is formed by saturating sulphuric acid with sulphur trioxide
C. Vitriol oil is nothing but technical sulphuric acid
D. Decomposition of sulphuric acid on heating does not start before its boiling

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Question 64

Electric bulbs are made of __________ glass.

A. Jena
B. Flint
C. Crookes
D. Pyrex

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Question 65

__________ is produced using molasses as the starting raw material.

A. Methyl alcohol
B. Ethyl alcohol
C. Benzol
D. Dimethyl ether

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Question 66

Sucrose content in cane sugar may be around __________ percent.

A. 50
B. 70
C. 80
D. 95

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Question 67

Percentage of alcohol in beer may be around __________ percent.

A. 2-8
B. 18-23
C. 27-32
D. 1-4

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Question 68

Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because

A. Its calorific value is very less
B. Tar neutralises the residual acids present in pitch
C. It reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop
D. All of the above

View Answer

Question 69

Aryl benzene sulphonate (ABS) is a

A. Detergent
B. Plasticiser for unsaturated polyester
C. Starting material for the synthesis of glycerine
D. Coating ingredient for photographic film

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Question 70

Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc?

A. Sodium silicate
B. Sodium borate
C. Sodium tripolyphosphate (STPP)
D. Caustic soda

View Answer

Question 71

The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is

A. Dilute H₂SO₄
B. Oleum
C. Ultraviolet light
D. None of these

View Answer

Question 72

Which of the following is not produced commercially from sea water?

A. Magnesium & potassium compounds
B. Common salt
C. Bromine
D. Iodine

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Question 73

Dacron (or terylene) fibres as compared to nylon's fibres have

A. Better heat & acid resistant properties
B. Poorer resistance to alkalis
C. Poorer dyeability
D. All of the above

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Question 74

In the manufacture of H₂SO₄, vanadium catalyst as compared to platinum catalyst

A. Gives higher conversion efficiency
B. Has a longer life and is not poisoned by arsenic
C. Handles lower SO₂ content gas (7 -10% SO₂), thus increasing the capital cost of the plant
D. All of the above

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Question 75

Which of the following contains least amount of N₂?

A. Coke oven gas
B. Blast furnace gas
C. Producer gas
D. Water gas (blue gas)

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Question 76

__________ is used as a flux in the smelting of copper ore like chalcopyrite.

A. Coke breeze
B. Lime powder
C. Silica/quartz
D. Dolomite

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Question 77

A unit operation is exemplified by the process of

A. Reduction
B. Desorption
C. Nitration
D. Combustion

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Question 78

Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of

A. Calcium sulphate
B. Sodium chloride
C. Sodium sulphate
D. Magnesium chloride

View Answer

Question 79

Which of the following is an ore of iron?

A. Galena
B. Chalcopyrite
C. Hematite
D. Bauxite

View Answer

Question 80

Dichloro diphenyl __________ is the full form of DDT (an insecticide).

A. Tetrachloroethane
B. Trichloroethane
C. Tetrachloromethane
D. Trichloromethane

View Answer

Question 81

Which of the following processes is absent in glass manufacturing process?

A. Sintering
B. Annealing
C. Shaping or forming
D. Melting

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Question 82

A good quality coal should have

A. Low fusion point of ash
B. High ash content
C. High sulphur content
D. None of these

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Question 83

The ideal pulp for the manufacture of paper should have high __________ content.

A. Cellulose
B. Lignin
C. Both A & B
D. None of these

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Question 84

__________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant.

A. Pyrex
B. Soda lime
C. Lead
D. High silica

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Question 85

Rotary kiln is not involved in the production of

A. Cement
B. Lime from limestone
C. Slaked lime from quick lime
D. None of these

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Question 86

Which is the main reducing agent during production of iron from iron ore in a blast furnace?

A. C
B. CO
C. CO₂
D. H₂

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Question 87

Which of the following is a constituent of vinegar?

A. Around 10% alcohol
B. Around 1% acetic acid
C. Both A and B
D. Neither A nor B

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Question 88

The most popular and common detergent i.e., alkyl benzene sulfonate (ABS) is a/an __________ detergent.

A. Cationic
B. Anionic
C. Amphoteric
D. Semi polar

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Question 89

__________ acid is an unsaturated fatty acid.

A. Palmitic
B. Oleic
C. Stearic
D. Oxalic

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Question 90

Carbon content of pitch (residue of coal tar distillation) is around __________ percent.

A. 70
B. 55
C. 80
D. 94

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Question 91

Alum is commercially produced from

A. Gypsum
B. Feldspar
C. Galena
D. Bauxite

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Question 92

Which of the following is not an abrasive material ?

A. Bakelite
B. Pumice
C. Corundum
D. Carborundum

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Question 93

Ethanol amine is produced using ammonia and

A. Ethyl benzene
B. Ethylene oxide
C. Ethanol
D. Ethane

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Question 94

Hydrocynic acid (HCN) is used as an insecticide for

A. Controlling timber degradation by ants
B. Controlling poultry lice
C. Potato beetle
D. Citrus fruits

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Question 95

Sodium bisulphite is used for __________ water.

A. Deaeration
B. Dechlorination
C. Both A & B
D. Neither A nor B

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Question 96

Zeolite is used in the

A. Water treatment
B. Glass manufacture
C. Hydrogenation of fatty oil as a catalyst
D. Development of exposed photographic plate

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Question 97

Chloral is used in the manufacture of

A. DDT
B. BHC
C. Parathion
D. None of these

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Question 98

Mannheim furnace is used in the manufacture of

A. Hydrochloric acid
B. H₂SO₄ by Chamber process
C. Calcium carbide
D. Corundum

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Question 99

Fourdrinier machine is used in the manufacture of

A. Nylon-6
B. Paper
C. Antibiotics
D. Sugar

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Question 100

Yeast is used in the manufacture of

A. Pencillin
B. Antibiotics
C. Wine
D. Pasteurised milk

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Question 101

Fourdrinier machine is used in the manufacture of

A. Sugar
B. Paper
C. Alcohol from molasses
D. Phenol formaldehyde

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Question 102

Bromine is used in the preparation of

A. Fire extinguishing compounds
B. Fire proofing agents
C. Dyes and antiknock compounds
D. All of the above

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Question 103

Percentage of uranium in carnotite ore found in Jadugoda (Jharkhand) is about

A. 0.1 to 0.5
B. 1 to 5
C. 5 to 10
D. 15 to 25

View Answer

Question 104

Laboratory glass wares which reacts with hydroflouric acid, are made of the __________ glass.

A. Lead
B. Borosilicate
C. Soda lime
D. Alkali silicate

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Question 105

Which of the following processes does not produce Cl₂ as a co-product during the manufacture of caustic soda?

A. Diaphragm electrolytic cell process
B. Mercury electrolytic cell process
C. Lime-soda process
D. None of these

View Answer

Question 106

__________ glass is used for the manufacture of optical glass.

A. Pyrex
B. Soda
C. Flint
D. Crooke's

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Question 107

Caprolactum (a raw material for nylon-6 manufacture) is produced from

A. Phenol
B. Naphthalene
C. Benzene
D. Pyridine

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Question 108

In the manufacture of viscose rayon, the raw material used industrially is

A. Recalyptious wood
B. Bamboo
C. Bagasse
D. Fine teak wood

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Question 109

Bromine content in sea water may be around __________ ppm.

A. 70
B. 640
C. 1875
D. 2500

View Answer

Question 110

Nickel is not used as a catalyst in the

A. Fischer-Tropsch process
B. Shift conversion
C. Hydrogenation of oil
D. Ostwald's process of HNO₃ manufacture

View Answer

Question 111

Contact process of sulphuric acid manufacture

A. Yields acid of higher concentration than chamber process
B. Yields acids of lower concentration than chamber process
C. Is obsolete
D. Eliminates absorber

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Question 112

Catalytic oxidation of toluene produces

A. Styrene
B. Phenol
C. Benzene
D. Tri-nitro-toluene

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Question 113

Which of the following processes can remove both temporary as well as permanent hardness of water?

A. Filtration
B. Boiling
C. Distillation
D. None of these

View Answer

Question 114

Which of the following is not responsible for causing permanent hardness of water?

A. Ca(HCO₃)₂
B. CaCl₂
C. MgCl₂
D. None of these

View Answer

Question 115

Function of sodium thiosulphate (hypo) in development of photographic film/plate is to

A. Brighten the faint images
B. Remove metallic silver
C. Convert silver chloride to silver
D. Remove unexposed silver halide

View Answer

Question 116

Liquor poisoning generally occurs due to the presence of __________ in it.

A. Ethyl alcohol
B. Impurities
C. Methyl alcohol
D. Carbonic acid

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Question 117

Sulphur removal by heating of pyrite ore in presence of air is called its

A. Reduction
B. Roasting
C. Calcination
D. Smelting

View Answer

Question 118

The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by

A. Electrolysis
B. Electrolytic reduction
C. Electrolytic oxidation
D. None of these

View Answer

Question 119

Reaction of calcium carbide with water produces a gas, which is used

A. As an illuminant
B. For metal cutting/welding
C. Both A & B
D. Neither A nor B

View Answer

Question 120

Fusion of bauxite and __________ produces high alumina cement.

A. Alum
B. Limestone
C. Coke
D. Quartz

View Answer

Question 121

Fusion of limestone and __________ produces high alumina cement.

A. Sand
B. Bauxite
C. Quicklime
D. Calcite

View Answer

Question 122

Which of the following, when pyrolysed, produces perchloro-ethylene?

A. Ethylene dichloride
B. Chlorobenzene
C. Carbon tetrachloride
D. Chlorinated paraffin

View Answer

Question 123

Naphthalene is removed from coke oven gas by

A. Adsorbing on palladium
B. Absorbing in ethanolamine
C. Scrubbing with wash oil
D. Passing it through electrostatic precipitator

View Answer

Question 124

Hydrophilic group of a soap or detergent solution is

A. Water hating
B. Soil loving
C. Water loving
D. None of these

View Answer

Question 125

__________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.

A. Chlorine
B. Ammonium chloride
C. Sodium carbonate
D. Sodium bi-carbonate

View Answer

Question 126

High temperature carbonisation of coal takes place at __________ °C.

A. 2000
B. 700
C. 1100
D. < 500

View Answer

Question 127

Low temperature carbonisation of coal takes place at __________ °C.

A. 300
B. 1100
C. 700
D. 900

View Answer

Question 128

Mercury electrolytic cell produces 50-70% NaOH solution. Its operating temperature is __________ °C.

A. 25
B. 60-70
C. 150-200
D. 250-300

View Answer

Question 129

Comparing sulphate process with sulphite process, we find that __________ in the later.

A. Both temperature & pressure in the former is less than that
B. Both temperature & pressure in the former is more than that
C. Temperature is more in the former whereas pressure is more
D. Pressure is more in the former whereas temperature is less

View Answer

Question 130

In contact process, SO₃ is absorbed in 97% H₂SO₄ and not in water, because

A. SO₃ gas is sparingly soluble in water
B. Water forms an acid mist, which is difficult to absorb
C. The purity of acid is affected
D. Scale formation in the absorber is to be avoided

View Answer

Question 131

Which of the following coals has the highest calorific value?

A. Lignite
B. Sub-bituminous
C. Anthracite
D. Peat

View Answer

Question 132

99.5% purity oxygen is used in

A. Cutting and welding by oxy-acetylene flame
B. Hospitals for medicinal purposes
C. Gas masks and artificial breathing apparatus
D. All of the above

View Answer

Question 133

Baking soda is chemically represented by

A. Na₂CO₃
B. NaHCO₃
C. Na₂CO₃.H₂O
D. Na₂CO₃.10H₂O

View Answer

Question 134

Washing soda is chemically represented by

A. Na₂CO₃
B. Na₂CO₃.H₂O
C. Na₂CO₃.10H₂O
D. NaHCO₃

View Answer

Question 135

Pick out the wrong statement.

A. Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively
B. Protein catalysts are called enzymes
C. The rate of chemical reaction is independent of the concentration of reactants at high concentration of enzymes
D. Total sugar content in molasses is about 10%

View Answer

Question 136

The basic difference between vegetable oils and fats is in their

A. Density
B. Chemical properties
C. Physical state
D. Composition

View Answer

Question 137

Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively

A. V₂O₅ & Cr₂O₃
B. Oxides of nitrogen & Cr₂O₃
C. V₂O₅ on a porous carrier & oxides of nitrogen
D. Oxides of nitrogen & V₂O₅ on a porous carrier

View Answer

Question 138

Favourable conditions for the liquefaction of gases in general are

A. High pressure & low temperature
B. Low pressure & high temperature
C. High pressure & high temperature
D. Low pressure & low temperature

View Answer

Question 139

Plasticisers are added to synthetic plastics to

A. Impart flexibility
B. Improve workability during fabrication
C. Develop new improved properties not present in the original resins
D. All of the above

View Answer

Question 140

Main constituent of dolomite is

A. CaCO₃
B. MgCO₃
C. K₂CO₃
D. Na₂CO₃

View Answer

Question 141

The major constituents of glass are

A. Lime, clay and soda ash
B. Sand, lime and soda ash
C. Silica, alumina and clay
D. Silica, alumina and soda ash

View Answer

Question 142

Bleaching action of bleaching powder is due to its __________ properties.

A. Reducing
B. Oxidising
C. Disinfecting
D. None of these

View Answer

Question 143

Bakelite is chemically known as

A. Polyvinyl chloride (PVC)
B. Polybutadiene
C. Phenol formaldehyde
D. Polyurathane

View Answer

Question 144

RDX (an explosive), which is more sensitive but less toxic than TNT, is chemically

A. Cyclo trimethylene trinitramine
B. Trinitro resorcinol
C. Cyclo tetramethylene tetranitramine
D. Trinitro benzene

View Answer

Question 145

Dechlorination of treated water is necessary to

A. Remove residual turbidity
B. Reduce the bacterial load on filter
C. Control taste and odour
D. Remove chlorinous taste

View Answer

Question 146

__________ nature of hypo (sodium thiosulphate) makes it useful in photography.

A. Oxidising
B. Reducing
C. Complex forming
D. Photochemical

View Answer

Question 147

Deaeration of water in its treatment is necessary, as it

A. Minimises its turbidity
B. Helps in controlling its taste and odour
C. Minimises its corrosiveness
D. None of these

View Answer

Question 148

Phenol formaldehyde resin is used as an adhesive in making

A. Laminates
B. Card boxes
C. Furniture
D. Books

View Answer

Question 149

Sizing material is incorporated in paper to

A. Impart resistance to penetration by liquids
B. Increase its thickness
C. Increase its flexibility & opacity
D. Increase its brightness

View Answer

Question 150

Solvent used for extraction of oil is

A. Hexane
B. Methyl ethyl ketone
C. Furfurol
D. None of these

View Answer

Question 151

Soap cannot be used with hard water, because

A. Hard water contains sulphate
B. They form insoluble calcium soaps which precipitate
C. They attract back the removed dirt
D. None of these

View Answer

Question 152

Chemical name of Grignard reagent is

A. Sodium thiosulphate
B. Ethyl magnesium chloride
C. Sodium sulphite
D. Sodium bicarbonate

View Answer

Question 153

Which glass is usually used in optical work?

A. Lead glass
B. High silica (borosilicate) glass
C. Photo-sensitive glass
D. Fibre glass

View Answer

Question 154

In industrial nomenclature, alcohol means

A. Butyl alcohol
B. Propyl alcohol
C. Ethanol
D. Methyl alcohol

View Answer

Question 155

The purpose of adding Na₂CO₃ to water of low alkalinity is to

A. Permit the use of alum as a coagulant
B. Increase the softening capacity of zeolite
C. Facilitate easy regeneration of zeolite
D. All of the above

View Answer

Question 156

Calgon used in water treatment is chemically

A. Sodium phosphate
B. Sodium hexametaphosphate
C. Calcium phosphate
D. Tricresyl phosphate

View Answer

Question 157

Addition of calcium oxide to water produces

A. Exothermic heat
B. Hissing sound
C. Slaked lime
D. All of the above

View Answer

Question 158

The main use of activated carbon in water treatment is to control

A. Bacterial growth
B. Taste and odour
C. Turbidity
D. None of these

View Answer

Question 159

Alcohol is produced by the

A. Oxidation of an aldehyde
B. Hydrolysis of an ether
C. Esterification of a fat
D. None of these

View Answer

Question 160

Type of glass used in optical work is the __________ glass.

A. Soda-lime
B. Fibre
C. Lead
D. Borosilicate

View Answer

Question 161

The most economical pulp for the production of newsprint would be the __________ pulp.

A. Groundwood
B. Sulphate
C. Sulphite
D. Semichemical

View Answer

Question 162

Solvay process as compared to dual process (i.e. modified Solvay process)

A. Can use low grade brine
B. Has less corrosion problems
C. Involves higher investment in NH₃ recovery units than that for crystallisation units for NH₄Cl
D. Both B and C

View Answer

Question 163

Reaction of an alcohol with organic acid is called the __________ reaction.

A. Saponification
B. Esterification
C. Neutralisation
D. Acidification

View Answer

Question 164

Pick out the wrong statement.

A. Eosin requirement in tallow soap is about 40-50% which fastens the lather formation, softens the hard soaps and increases its cleansing action
B. Soap powder is prepared by mixing soap with hydrated sodium carbonate
C. Detergents differ from soaps in their action in hard water
D. Tarnish inhibitor (e.g., benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc

View Answer

Question 165

Cumene (isopropyl benzene) is made by

A. Oxidation of napthalene
B. Propylene alkylation of benzene
C. Polymerisation of a mixture of benzene & propylene
D. None of these

View Answer

Question 166

Impurities present in brine is normally removed by treatment with

A. NH₃ and CO₂
B. Lime and soda ash
C. Lime, ammonia and carbon
D. All of the above

View Answer

Question 167

Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials.

A. Coke and sand
B. Brine and coal
C. Coke and caustic soda
D. None of these

View Answer

Question 168

The gasification reaction represented by, C + H₂O = CO + H₂, is a/an __________ reaction.

A. Exothermic
B. Endothermic
C. Catalytic
D. Autocatalytic

View Answer

Question 169

Which of the following is an organo-metal-lic compound?

A. Isopropyl alcohol
B. Tetra-ethyl lead
C. Zeolite
D. Cumene

View Answer

Question 170

Dense soda ash used in the manufacture of glass, is chemically represented by

A. Na₂CO₃
B. Na₂CO₃.10H₂O
C. Na₂CO₃.H₂O
D. Na₂HCO₃

View Answer

Question 171

At a given temperature, the equilibrium yield of SO₃ obtained from the oxidation of SO₂ is proportional to (where, P = pressure of the system )

A. P
B. √P
C. P²
D. 1/P

View Answer

Question 172

Analgesic drugs are

A. Pain relievers
B. Antibiotics
C. Used in the treatment of T.B.
D. Used in the treatment of typhiod

View Answer

Question 173

Refractory bricks having high thermal conductivity is desirable, when it is to be used in the

A. L.D. converter
B. Blast furnace
C. Rotary kiln
D. Recuperator

View Answer

Question 174

Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale.

A. Nickel
B. Vanadium
C. Alumina
D. Iron

View Answer

Question 175

Poly Vinyl Chloride (P.V.C.) is a __________ material.

A. Thermosetting
B. Thermoplastic
C. Fibrous
D. Chemically active

View Answer

Question 176

Titanium dioxide is a/an __________ colour pigment.

A. White
B. Black
C. Yellow
D. Blue

View Answer

Question 177

Which of the following is used as a coagulant in treating turbid water?

A. Chlorine
B. Ferric sulphate
C. Calcium sulphate
D. Activated carbon

View Answer

Question 178

__________ is a thermosetting plastic.

A. Polyvinyl chloride
B. Polythene
C. Bakelite
D. Teflon

View Answer

Question 179

__________ is a thermosetting plastic.

A. Polythene
B. Epoxy polymer
C. P.V.C.
D. Polystyrene

View Answer

Question 180

Antibiotic

A. Inhibits/destroys the growth of microorganisms
B. Is used as a pain reliever
C. Is an antimalarial
D. Is an anaesthetic

View Answer

Question 181

Commercial production of Vanaspati is done by __________ of edible vegetable oils.

A. Hydrogenation
B. Oxidation
C. Hydrolysis
D. Hydrocracking

View Answer

Question 182

Calcination of limestone is not done in a __________ kiln for producing lime.

A. Vertical shaft
B. Rotary
C. Fluidised bed
D. Fixed bed

View Answer

Question 183

__________ paper is used in the manufacture of newsprint paper.

A. Groundwood
B. Board
C. Tissue
D. Wrapping

View Answer

Question 184

Free alkali in a toilet soap is __________ that in a laundary shop.

A. Less than
B. More than
C. Same
D. None of these

View Answer

Question 185

Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.

A. CaO
B. MnO₂
C. ZnO
D. FeS

View Answer

Question 186

Digestion of wood-base materials (for manufacture of pulp) is done to

A. Remove lignin
B. Produce long fibres
C. Prevent deterioration on storage
D. None of these

View Answer

Question 187

Polythene is a/an __________ polymerisation product.

A. Addition
B. Condensation
C. Thermosetting
D. None of these

View Answer

Question 188

Raw materials for 'Solvay Process' for manufacture of the soda ash are

A. Salt, limestone and coke or gas
B. Ammonia, salt and limestone
C. Ammonia limestone and coke
D. None of these

View Answer

Question 189

Pick out the wrong statement.

A. Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80%
B. Contact process of sulphuric acid manufacture produces pure acid of concentration ≥ 98%
C. 75% oleum can be produced by distillation of 20% oleum
D. Contact process of sulphuric acid manufacture uses nickel as the catalyst

View Answer

Question 190

Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials.

A. Adsorbs
B. Oxidises
C. Reduces
D. Converts

View Answer

Question 191

Penicillin is separated from fermented broth by

A. Extraction with amyl or butyl acetate
B. Ternery azeotropic distillation
C. Evaporation in calendria
D. Extractive distillation

View Answer

Question 192

Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood.

A. 1
B. 2.5
C. 5
D. 10

View Answer

Question 193

Pencillin is made employing __________ fermentation process.

A. Continuous
B. Aerobic batch
C. Anaerobic batch
D. None of these

View Answer

Question 194

Nitroglycerene absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as a controlled explosive called dynamite. The raw material used for its manufacture are glycerene, nitric acid and

A. Sulphuric acid
B. Phosphoric acid
C. Hydrochloric acid
D. Hydroflouric acid

View Answer

Question 195

For the hydrogenation of oils (i) __________ is commonly used as catalyst and (ii) __________ is a catalyst poison.

A. (i) platinum (ii) sulphur
B. (i) palladium (ii) oxygen
C. (i) nickel (ii) sulphur
D. (i) nickel (ii) oxygen

View Answer

Question 196

More than 100 percent of __________ is present in oleum.

A. SO₃
B. H₂SO₄
C. H₂SO₃
D. SO₂

View Answer

Question 197

Calcareous & argillaceous materials are used in the manufacture of

A. Lead
B. Cement
C. Carbon disulphide
D. None of these

View Answer

Question 198

Fire clay is __________ refractory material.

A. A basic
B. An acidic
C. A neutral
D. Not a

View Answer

Question 199

Pick out the wrong statement.

A. Catalytic hydrogenation of carbon monoxide produces methyl alcohol
B. In nylon-6, the number 6 represents the total number of carbon atoms in the ring
C. Raw materials for DDT manufacture are benzene and chlorine
D. Ethanolamines are produced by using ammonia and ethylene oxide as raw material

View Answer

Question 200

Chemical name of aspirin (an analgesic drug) is

A. Acetylsalicylic acid
B. Nictonic acid
C. Calcium acetate
D. Methyl salicylate

View Answer

Question 201

Metallic soap is __________ salt of fatty acids.

A. Sodium
B. Potassium
C. Both sodium & potassium
D. Aluminium or calcium

View Answer

Question 202

__________ is a polysacchride.

A. Maltose
B. Starch
C. Sucrose
D. Glucose

View Answer

Question 203

Fermentator temperature during production of alcohol from molasses is around __________ °C.

A. 5
B. 30
C. 150
D. 300

View Answer

Question 204

__________ is an ore of lead.

A. Quartz
B. Galena
C. Siderite
D. Chalcopyrite

View Answer

Question 205

20% oleum means that in 100 kg oleum, there are 20 kg of

A. SO₃ and 80kg of H₂SO₄
B. H₂SO₄ and 80kg of SO₃
C. SO₃ for each 100 kg of H₂SO₄
D. None of these

View Answer

Question 206

Vinyl chloride (CH₂ = CH.Cl) is produced by the thermal pyrolysis of ethylene dichloride at a pressure & temperature of

A. 4 kgf/cm² & 500°C
B. 10 kgf/cm² & 1000°C
C. 40 kg/cm² & 200°C
D. 100 kgi/cm² & 500°C

View Answer

Question 207

10% oleum comprises of 10% free

A. SO₂
B. H₂SO₃
C. SO₃
D. H₂SO₄

View Answer

Question 208

The catalyst used in the production of elemental sulphur from H₂S (by oxidation-reduction) is

A. Alumina
B. Silica gel
C. Platinum
D. Nickel

View Answer

Question 209

__________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.

A. Solvay
B. Ostwald's
C. Haber's
D. None of these

View Answer

Question 210

Phosphate rock is a raw material for the manufacture of

A. Phosphoric acid
B. Phosphorous
C. Superphosphates
D. All of the above

View Answer

Question 211

Carbon tetrachloride (CCl₄) is the starting raw material for the manufacture of

A. Trichloroethylene
B. Perchloroethylene
C. Parathion
D. Methanol

View Answer

Question 212

Salt is the basic raw material for the manufacture of

A. Cement
B. Glass
C. Potteries
D. Caustic soda

View Answer

Question 213

Black liquor is converted into white liquor by

A. Evaporation and burning the concentrate followed by causticisation of products
B. Multi-effect evaporation only
C. Selective liquid extraction
D. Extractive distillation

View Answer

Question 214

Fatty material used in soap making is

A. Fatty acid
B. Fatty alcohols
C. Tallow
D. Detergents

View Answer

Question 215

Glycerine is a by-product of the __________ industry.

A. Soap
B. Detergent
C. Oil hydrogenation
D. Paint

View Answer

Question 216

Lubricating greases are a mixture of

A. Mineral oil, soap and additives
B. Mineral oil and metallic soap
C. Mineral oil and fatty oil
D. Fatty oil and metallic soap

View Answer

Question 217

Sudden temperature fluctuation does not affect pyrex glass, because of its

A. Low co-efficient of expansion
B. High co-efficient of expansion
C. High melting point
D. Both B and C

View Answer

Question 218

Hydrogenation of edible vegetable oils

A. Is an exothermic reaction
B. Increases their melting point
C. Is done in presence of nickel catalyst
D. All of the above

View Answer

Question 219

Rancidity of the fatty oil can be reduced by its

A. Decoloration
B. Hydrogenation
C. Oxidation
D. Purification

View Answer

Question 220

The main product of high temperature carbonisation of coal is

A. Coke
B. Ammonia
C. Tar
D. Phenol

View Answer

Question 221

Bakelite is

A. Same as poly tetrafluoroethylene (PTFE)
B. An inorganic polymer
C. Same as thermosetting phenol-formaldehyde
D. Not a polymer

View Answer

Question 222

Presence of H₂S in raw water (to be chlorinated) results in the

A. Reduced softening capacity of zeolite
B. Increased dosage of chlorine to provide a disinfecting residual in the water
C. Easy removal of its hardness
D. None of these

View Answer

Question 223

Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of

A. Carbon
B. Arsenic
C. Lead
D. Sulphur

View Answer

Question 224

The temperature in the calcium carbide furnace is __________ °C.

A. 200-300
B. 700-850
C. 2000-2200
D. 4000-4500

View Answer

Question 225

Bio-degradable detergents

A. Can be readily oxidised
B. Pose problem in sewerage plant
C. Have an isoparaffinic structure
D. Should not be used as it spoils the cloth

View Answer

Question 226

Bitterns is a/an

A. Unsaturated fat
B. Starting material for the production of iodine
C. By-product of chlor-alkali industry
D. None of these

View Answer

Question 227

Which is the most suitable dye for synthetic fibres?

A. Acid dye
B. Azoic dye
C. Pigment dye
D. Mordant dye

View Answer

Question 228

Blue vitriol is chemically

A. Copper sulphate
B. Ferrous sulphate
C. Copper nitrate
D. Aluminium sulphate

View Answer

Question 229

Presence of carbonaceous matter in the sewage

A. Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures
B. Reduces sulphate ions to sulphides causing obnoxious smell
C. Increases the quantity of chlorine used for its purification
D. All of the above

View Answer

Question 230

Bordeaux mixture is a/an

A. Fertiliser
B. Inorganic fungicide
C. Insecticide
D. Explosive

View Answer

Question 231

The noble gas which occurs most abundantly in the atmosphere is

A. Helium
B. Neon
C. Krypton
D. Argon

View Answer

Question 232

BHC (Benzene hexachloride) is made by the chlorination of benzene

A. Which is an addition reaction
B. Which is a substitution reaction
C. In absolute dark
D. In presence of sunlight

View Answer

Question 233

Multistage catalytic converter is not used in the

A. Conversion of SO₂ to SO₃
B. NH₃ synthesis reaction
C. Both A & B
D. Neither A nor B

View Answer

Question 234

Temperature during hydrogenation of oil should not be more than 200°C, otherwise it will result in

A. Pyrolysis of oil
B. Sintering of porous catalyst
C. Hydrogen embrittlement
D. All of the above

View Answer

Question 235

Sand and __________ is fused at 1300°C, to produce sodium silicate.

A. Limestone
B. Soda ash
C. Coke
D. Sodium sulphate

View Answer

Question 236

Ca(OH)₂ is called

A. Quicklime
B. Slaked lime
C. Limestone
D. Gypsum

View Answer

Question 237

Calcination of gypsum produces

A. Plaster of paris
B. Salt cake
C. Nitre cake
D. Lime

View Answer

Question 238

CaO is called

A. Quick lime
B. Slaked lime
C. Limestone
D. Calcite

View Answer

Question 239

High temperature carbonisation of coal produces

A. Inferior coke compared to low temperature carbonisation
B. Less of gases compared to liquid products
C. Larger quantity of tar compared to low temperature carbonisation
D. None of these

View Answer

Question 240

Carborundum consists mainly of

A. Bauxite
B. Silicon carbide
C. Boron carbide
D. Calcium carbide

View Answer

Question 241

CaSO₄ .1/2 H₂O is known as

A. Blue vitriol
B. Plaster of Paris
C. Gypsum
D. Zeolite

View Answer

Question 242

Saponification number of an oil or fat

A. Gives an idea about its molecular weight
B. Is inversely proportional to its molecular weight
C. Detects its adulteration
D. All of the above

View Answer

Question 243

The difference between saponification value and acid value is

A. Called ester value
B. Always negative
C. Constant for all fatty oils
D. None of these

View Answer

Question 244

Hydrogenation of oil takes place in a/an __________ reactor.

A. Autothermal
B. Trickle bed
C. Plug flow
D. None of these

View Answer

Question 245

Celluloid is chemically

A. Cellulose acetate
B. Regenerated cellulose
C. Cellulose nitrate
D. Cellulose acetate butyrate

View Answer

Question 246

Cement mainly contains

A. CaO, SiO₂, Al2O₃
B. MgO, SiO₂, K₂O
C. Al2O₃, MgO, FE₂O₃
D. CaO, MgO, K₂O

View Answer

Question 247

Chemical formula of oleum is

A. H₂SO₃
B. H₂SO₄
C. H₂S₂O₇
D. H₂SO₇

View Answer

Question 248

Chemical name of 'alum' is

A. Barium sulphate
B. Aluminium sulphate
C. Aluminium chloride
D. Calcium sulphate

View Answer

Question 249

Chemical name of soda ash is

A. Sodium bicarbonate
B. Sodium thiosulphate
C. Potassium carbonate
D. None of these

View Answer

Question 250

Main product in calcium carbide-water reaction is

A. Ca(OH)₂
B. C₂H₂
C. CO₂
D. CaCO₃

View Answer

Question 251

CaCl(OCl) is the chemical formula of

A. Hypo
B. Bleaching powder
C. Plaster of paris
D. Aqua regia

View Answer

Question 252

Carboxymethyl cellulose (CMC) is added in detergents to

A. Prevent redeposition of soil on cleaned surface
B. Act as optical brightening agent
C. Inhibit corrosion in washing machines made of aluminium
D. None of these

View Answer

Question 253

Which of the following is used as a coagulant in water treatment?

A. Chloramine
B. Chlorine
C. Ferrous sulphate
D. Hydrogen peroxide

View Answer

Question 254

Coal tar is used as a

A. Binding material for coal briquettes
B. Fuel in rotary kiln
C. Binder in making carbon electrodes
D. All of the above

View Answer

Question 255

The process involved in converting rubber into a thin sheet or coating it on fabric is called

A. Extrusion
B. Mastication
C. Calendering
D. Valcanisation

View Answer

Question 256

Raw material used in alcohol distilleries in India is

A. Molasses
B. Benzol
C. Methylated spirit
D. None of these

View Answer

Question 257

Fermentation of molasses to produce ethyl alcohol is done at __________ °C

A. 20 - 30
B. < - 5
C. 100 - 150
D. 250 - 300

View Answer

Question 258

The end bleaching agent used to move last traces of colour bodies from the pulp is

A. Chlorine dioxide (ClO₂)
B. MgO
C. SO₂ gas
D. Mercaptans

View Answer

Question 259

Styrene-butadiene-rubber (SBR) as compared to natural rubber has

A. Poorer tensile strength
B. Poorer resistance to oxidation
C. Greater amount of heat build-up under heavy loading
D. All of the above

View Answer

Question 260

Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo?

A. Depithing
B. Digestion
C. Bleaching
D. None of these

View Answer

Question 261

Starting raw material for the manufacture of maleic anhydride is

A. N-butene
B. Benzene
C. Either A or B
D. Neither A nor B

View Answer

Question 262

Catalyst used during the manufacture of 'Vanaspati Ghee' is

A. Zinc
B. Nickel
C. Platinum
D. Copper

View Answer

Question 263

Fat splitting catalyst is

A. CaCO₃
B. ZnO
C. Al2O₃
D. Fe

View Answer

Question 264

Fats as compared to oils have

A. More unsaturated glycerides of fatty acids
B. Less unsaturated glycerides of fatty acids
C. Much higher reactivity to oxygen
D. Lower melting point

View Answer

Question 265

Vegetable oils and fats basically differ in their

A. Density ranges
B. Physical state
C. Chemical composition
D. Chemical properties

View Answer

Question 266

Which oil is preferred for paint manufacture?

A. Drying oil
B. Non-drying oil
C. Semi-drying oil
D. Saturated oil

View Answer

Question 267

Which of the following is not a pyrite ore?

A. Celestite
B. Galena
C. Gypsum
D. Siderite

View Answer

Question 268

Which is the most efficient absorbant for SO₃ out of the following?

A. 20% oleum
B. 65% oleum
C. 78%H₂SO₄
D. 98%H₂SO₄

View Answer

Question 269

Fumigant insecticides

A. Kill insects, when they eat it
B. Emit poisonous vapour
C. Are absorbed throughout the plant
D. None of these

View Answer

Question 270

Fusel oil is a/an

A. Essential oil
B. Extract from medicinal herbs
C. Mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses)
D. None of these

View Answer

Question 271

Which of the following is a constituent of coffee?

A. Caffeine
B. Nicotine
C. Calgon
D. Lignin

View Answer

Question 272

Which of the following is an endothermic reaction?

A. Absorption of SO₃ in 98% H₂SO₄
B. C + H₂O = CO + H₂
C. Thermal dissociation of iron pyrites
D. Both B and C

View Answer

Question 273

Salt is added in the kettle during soap manufacture to separate

A. Soap from lye
B. Glycerine from lye
C. The metallic soap
D. The unsaponified fat from soap

View Answer

Question 274

High magnesia lime is added to hot sugar cane juice (during the manufacture of sugar) to

A. Flocculate the impurities
B. Facilitate fast filtration
C. Both A and B
D. Neither A nor B

View Answer

Question 275

During the absorption of HCl gas in water (to produce liquid HCl), the gas is kept above dew point to

A. Increase the rate of absorption
B. Avoid corrosion
C. Reduce the cooling water circulation rate
D. None of these

View Answer

Question 276

Glass is

A. Mainly CaO
B. Subjected to galvanising
C. A super cooled liquid
D. All of the above

View Answer

Question 277

Glauber's salt is chemically

A. Calcium sulphate
B. Potassium sulphate
C. Potassium chlorate
D. None of these

View Answer

Question 278

Glycerine can be obtained from

A. Fat
B. Naphthalene
C. Cumene
D. Sucrose

View Answer

Question 279

Glycerine is not used in the

A. Manufacture of explosive
B. Conditioning and humidification of tobacco
C. Manufacture of pharmaceuticals
D. None of these

View Answer

Question 280

Graphite is a/an

A. Electrical insulator
B. Allotrope of carbon
C. Moderator used in nuclear reactor
D. Both B and C

View Answer

Question 281

Gun powder uses

A. Sulphur
B. Charcoal
C. Potassium nitrate
D. All of the above

View Answer

Question 282

Gypsum is chemically

A. Calcium chloride
B. Potassium sulphate
C. Sodium sulphate
D. Calcium sulphate

View Answer

Question 283

Lime and soda ash are added to water to remove

A. Bicarbonates & sulphates of calcium and magnesium
B. Undersirable taste and odour
C. Bacteria
D. Its corrosiveness

View Answer

Question 284

Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H₂O = Fe₃O₄ + 4H₂, is not practised, as it is

A. A slow reaction
B. A discontinuous reaction (requiring regeneration of iron by water gas intermittently)
C. Still in development stage (by employing fluidised bed technique)
D. All of the above

View Answer

Question 285

Chalcopyrite is the main ore of

A. Copper
B. Lead
C. Tin
D. Iron

View Answer

Question 286

Phthalic anhydride is made by the

A. Oxidation of naphthalene
B. Oxidation of benzene
C. Dehydrogenation of ethyl benzene
D. None of these

View Answer

Question 287

Iron ore hametite is concentrated using

A. Electro magnetic separation mainly
B. Gravity separation
C. Froth floatation
D. Roasting

View Answer

Question 288

Hard water

A. Does not affect the lather formation by soap
B. Is not unfit for drinking purpose
C. Pollutes the water stream
D. All of the above

View Answer

Question 289

Chemical formula of BHC, which is an insecticide is

A. C₆H₆Cl₆
B. C₆Cl₆
C. C₆H₅Cl
D. C₆H₄Cl₂

View Answer

Question 290

At very high concentration of enzymes, the rate of fermentation chemical reaction is __________ the concentration of reactants.

A. Independent of
B. Directly proportional to
C. Inversely proportional to
D. Proportional to the square of

View Answer

Question 291

Which of the following is an explosive?

A. Nitroglycerene
B. Trintrotoluene (TNT)
C. Cellulose nitrate
D. All of the above

View Answer

Question 292

Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?

A. High cost of mercury
B. High specific gravity of mercury
C. Non-availability of high purity mercury
D. Pollution of water stream by mercury

View Answer

Question 293

Industrial production of chloroform requires acetone and

A. Phosgene
B. Calcium hypochlorite
C. Chlorine
D. Ammonium chloride

View Answer

Question 294

Yellow phosphorus is transported under

A. Air
B. Water
C. Nitrogen
D. Helium

View Answer

Question 295

SO₂ is bubbled through hot sugar cane juice to

A. Act as an acidifying agent
B. Increase its concentration
C. Increase the amount of molasses
D. Increase the crystal size

View Answer

Question 296

Hydrazine is largely used

A. As a starting material for 'hypo'
B. In photographic industry
C. As rocket fuel
D. In printing industry

View Answer

Question 297

Hydrogenation of oil does not

A. Remove double bonds
B. Raise its melting point
C. Improve its resistance to oxidation
D. None of these

View Answer

Question 298

Hydrolysis of sugar is called

A. Hydration
B. Inversion
C. Esterification
D. None of these

View Answer

Question 299

Ethyl alcohol cannot be produced

A. From waste sulphite substrate of paper mills
B. By esterification and hydroloysis of ethylene
C. From molasses
D. None of these

View Answer

Question 300

Pencillin, an antibiotic drug was discovered by

A. Alexender
B. Flaming
C. Dr. Zivago
D. None of these

View Answer

Question 301

Chemical formula of 'salt cake' is

A. Na₂SO₄
B. CaSO₄
C. MgSO₄
D. BaSO₄

View Answer

Question 302

Detergent is produced by the sulphonation of dodecyl benzene, which is an __________ reaction.

A. Endothermic
B. Exothermic
C. Irreversible
D. Both B and C

View Answer

Question 303

Plasticisers are added to paints to

A. Make it corrosion resistant
B. Make glossy surface
C. Give elasticity & prevent cracking of the film
D. Increase atmospheric oxidation

View Answer

Question 304

Pick out the correct statement.

A. A fat is converted into oil by its hydrogenation
B. There is no difference between a fat and an oil so far as its physical properties are concerned
C. All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms
D. Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their fatty acids content

View Answer

Question 305

Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene?

A. AgO
B. Al2O₃
C. ZnCl₂
D. FE₂O₃

View Answer

Question 306

Brackish water which contains mostly dissolved salt, can be purified by the __________ process.

A. Reverse osmosis
B. Sand filter
C. Lime soda
D. Permutit

View Answer

Question 307

Stereospecific agents are exemplified by

A. Radiation
B. Supported metal oxide catalysts
C. Ziegler catalysts
D. All of the above

View Answer

Question 308

High purity nitrogen is used in

A. Making protective gas (95% N₂ + 5% H₂) for annealing of cold rolled steel strip coils
B. Fire fighting purposes
C. Both A & B
D. Neither A nor B

View Answer

Question 309

Which of the following impurities in feed water for high pressure boiler is the most detrimental?

A. Silica
B. Dissolved oxygen
C. Suspended salt
D. Dissolved salt

View Answer

Question 310

Essential oils are usually obtained using

A. Steam distillation
B. Extractive distillation
C. Solvent extraction
D. Leaching

View Answer

Question 311

Cooking liquor in case of sulphite process is

A. Sodium sulphite and sodium bisulphite
B. Magnesium sulphite and free SO₂ in acid medium
C. Magnesium sulphate and magnessium bicarbonate
D. None of these

View Answer

Question 312

The main component of pyrex glass is

A. Zinc
B. Lead
C. Boron
D. Celenium

View Answer

Question 313

Main constituent of limestone is

A. CaCO₃
B. MgCO₃
C. Na₂CO₃
D. CaSO₄

View Answer

Question 314

Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at

A. 1 atm & 100°C
B. 5 atm & 275°C
C. 100 atm & 500°C
D. 50 atm & 1000°C

View Answer

Question 315

Catalyst used in the hydrogenation of oil is

A. Nickel
B. Platinum
C. Iron
D. Alumina

View Answer

Question 316

In the Lurgi coal gasifier

A. Coking coals cannot be used
B. Low carbon conversion efficiency is achieved
C. Entrainment of solids is higher
D. Large quantity of coal can be processed

View Answer

Question 317

Use of chlorine in the treatment of sewage

A. Helps in grease separation
B. Increases the biological oxygen demand(BOD)
C. Causes bulking of activated sludge
D. Aids in flocculation

View Answer

Question 318

Bleaching of paper pulp is done with

A. Activated clay
B. Bromine
C. Chlorine or chlorine dioxide
D. Magnesium sulphite

View Answer

Question 319

__________ is produced using polycondensation reaction.

A. Polythene
B. Phenol formaldehyde
C. Poly vinyl chloride
D. None of these

View Answer

Question 320

Flux addition during smelting of ore is done to

A. Remove impurities/gangue
B. Enhance rate of reaction
C. Accelerate reduction of ore
D. Separate slag from metal

View Answer

Question 321

Pick out the wrong statement pertaining to the soap manufacture.

A. Transparent soaps are made by cold process
B. Organic pigments are used as colouring materials in the soap manufacture
C. Both laundary as well as toilet soaps are manufactured by hot process
D. Colourless rosin is used in the manufacture of laundary soaps

View Answer

Question 322

Carbon disulphide is mainly used in the production of

A. Viscose rayon
B. Corundum
C. Plasticiser for unsaturated polyester
D. Paints

View Answer

Question 323

Insulin is an __________ drug.

A. Anti-malarial
B. Anti-TB
C. Antibiotic
D. None of these

View Answer

Question 324

Inversion of sucrose produces

A. Fructose
B. Glucose
C. Both A & B
D. Neither A nor B

View Answer

Question 325

The function of gypsum addition during cement making is to

A. Increase the density of cement
B. Decrease the cement setting rate
C. Both A and B
D. Neither A nor B

View Answer

Question 326

Catalytic oxidation-dehydrogenation of methyl alcohol produces

A. Formaldehyde
B. Phenol
C. Acetone
D. Maleic anhydride

View Answer

Question 327

The combustion reaction, C + O₂ = CO₂, is

A. Exothermic
B. Endothermic
C. Autocatalytic
D. None of these

View Answer

Question 328

In Kraft process of paper manufacture, white cooking liquor consists of caustic soda

A. Sodium sulphide & sodium carbonate
B. Sodium sulphite & sodium carbonate
C. Sodium sulphite & sodium sulphide
D. None of these

View Answer

Question 329

Sodium chloride content in sea water is about __________ gms/litre.

A. 2
B. 10
C. 25
D. 50

View Answer

Question 330

Basic oxide is absent in __________ glass.

A. Flint
B. Pyrex
C. Quartz
D. All of the above

View Answer

Question 331

Which of the following is an unsaturated fatty acid?

A. Lauric acid
B. Palmitic acid
C. Stearic acid
D. Oleic acid

View Answer

Question 332

Zeolite used in water softening process (cation exchange) is regenerated by washing with

A. Brine
B. Chloramines
C. Sodium bisulphite
D. Liquid chlorines

View Answer

Question 333

White phosphorous is stored under water, because

A. It does not react with water
B. It is poisonous
C. Its kindling temperature in dry air is very low
D. It is unstable

View Answer

Question 334

The most stable allotropic form of phosphorous is the __________ phosphorous.

A. White
B. Black
C. Yellow
D. Red

View Answer

Question 335

Coagulant is used __________ filtration.

A. Before
B. After
C. During
D. To avoid

View Answer

Question 336

Deacon's method is used for the manufacture of

A. Glauber's salt
B. Common salt
C. Chlorine
D. Graphite electrode

View Answer

Question 337

Solvay process is used for the manufacture of

A. Caustic soda
B. Soda ash
C. Caustic potash
D. Soda lime

View Answer

Question 338

The terminology 'BTX' used in coal tar distillation industry refers to

A. Benzol-toluol-xylol
B. Benzol-toluene-xylene
C. Benzene-toluol-xylol
D. Benzene-toluene-xylene

View Answer

Question 339

Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.

A. Cutting
B. Fibrillation
C. Hydration
D. Strengthening

View Answer

Question 340

Sulphuric acid completely saturated with sulphur trioxide is called

A. Concentrated sulphuric acid
B. Oleum
C. Sulphurous acid
D. Dilute sulphuric acid

View Answer

Question 341

__________ is the major constituent of the Portland cement.

A. Calcium carbonate
B. Calcium oxide
C. Tricalcium silicate
D. Calcium sulphate

View Answer

Question 342

The product obtained on mixing calcium oxide with water is called

A. Quicklime
B. Slaked lime
C. Milk of lime
D. None of these

View Answer

Question 343

Kaoline is a/an

A. Refractory material
B. Synthetic resin
C. Artificial abrasive
D. Blue pigment

View Answer

Question 344

Coke oven gas consists mainly of

A. H₂, & CH₄
B. CO, & CO₂
C. H₂, & CO
D. CH₄, & CO

View Answer

Question 345

Commonly used glass is known as the __________ glass.

A. Flint
B. Hard
C. Pyrex
D. Soda

View Answer

Question 346

Kopper-Totzek coal gasifier

A. Can give ammonia synthesis gas (H₂ + N₂)
B. Is a moving bed reactor
C. Cannot use coking coal
D. Operate at very high pressure

View Answer

Question 347

The amount of benzene present in pure benzol is about __________ percent.

A. 30
B. 50
C. 70
D. 90

View Answer

Question 348

Concentration of NaOH solution produced by diaphragm electrolytic cell is about __________ percent.

A. 10
B. 25
C. 50
D. 98

View Answer

Question 349

The yield of tar from high temperature carbonisation of dry coal is about __________ percent.

A. 3
B. 12
C. 22
D. 0.3

View Answer

Question 350

An oil is converted into fat by its

A. Hydrogenation
B. Hydrolysis
C. Hydrocracking
D. Hydration

View Answer

Question 351

Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces

A. Nylon-6
B. Dacron
C. Polyester
D. PVC

View Answer

Question 352

Portland cement consists mainly of

A. CaO & SiO₂
B. SiO₂ & Al2O₃
C. CaO & Al2O₃
D. CaO & FE₂O₃

View Answer

Question 353

Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have

A. High electrical insulation properties
B. Sharp melting points
C. Low co-efficient of thermal expansion
D. Compressive strength much greater than their tensile strengths

View Answer

Question 354

The compressive strength of cement should not be less than about 110Kg/cm² after three days & not less than 170Kg/cm² after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm²/gm.

A. 800
B. 1600
C. 4000
D. 8500

View Answer

Question 355

Electrodeposition of metals i.e. electroplating is never done on

A. Metals
B. Alloys
C. Refractories
D. Non-metals

View Answer

Question 356

Viscosity index improver (like polystrene or polyisobutylene) is added to lubricant to

A. Reduce its viscosity
B. Increase its viscosity
C. Reduce the variation in its viscosity with temperature
D. Increase the variation in its viscosity with temperature

View Answer

Question 357

P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as

A. Bakelite
B. Neoprene
C. Teflon
D. Nylon-66

View Answer

Question 358

Lindane is

A. Not a fumigant
B. BHC (Benzene Hexa Chloride) containing 99% γ-isomer
C. A by-product of BHC manufacture
D. Both B and C

View Answer

Question 359

Litharge is

A. Lead oxide
B. Zinc oxide
C. Zinc sulphide
D. Cellulosic photographic material

View Answer

Question 360

Lithopaneis

A. Explosive
B. White lead
C. Filter aid
D. ZnS (white pigment)

View Answer

Question 361

Which of the following is an yellow pigment?

A. Titanium dioxide
B. Ferrous sulphate
C. Lead chromates
D. Zinc sulphides

View Answer

Question 362

Which of the following is not an antibiotic?

A. Penicillin
B. Streptomycin
C. Tetracyclin
D. Quinine

View Answer

Question 363

Which of the following is not an insecticide?

A. Hydrocyanic acid
B. Nicotine
C. Sodium flouride
D. Hexane

View Answer

Question 364

Nylon 66 is so named because the

A. Average degree of polymerisation of the polymer is 1966
B. Number of carbon atoms between two nitrogen atoms are 6
C. Number of nitrogen atoms between two carbon atoms are 6
D. Polymer was first synthesised in 1966

View Answer

Question 365

Low purity oxygen is used for

A. L.D. steel making
B. Cutting and welding of metals
C. Medicinal purposes
D. Chemical oxidation processes

View Answer

Question 366

Which of the following is not a food additive?

A. Citric acid
B. Invertage
C. Benzoyl peroxide
D. Ammonium chloride

View Answer

Question 367

Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction?

A. Oxidation of Na+ ions
B. Oxidation of Cl- ions
C. Reduction of Na+ ions
D. Reduction of Cl- ions

View Answer

Question 368

Concentration of sulphide ores is done usually by

A. Roasting
B. Smelting
C. Froth floatation
D. Electro magnetic separation

View Answer

Question 369

Finely ground calcium aluminate & silicate is a/an

A. Cermet
B. Cement
C. Abrasive
D. Explosive

View Answer

Question 370

Tall oil obtained as a by-product from the black liquor recovery is

A. A black, sticky & viscous liquid
B. Used in the manufacture of greases, emulsions & soaps
C. Composed mainly of rosin & fatty acids
D. All of the above

View Answer

Question 371

Main use of hydrazine is

A. As a rocket fuel
B. In water treatment
C. As a disinfectant
D. As fire retardant

View Answer

Question 372

In the manufacture of sulphuric acid from elemental sulphur, the following sequence of major operations is followed :

A. Furnace → converter → absorber
B. Furnace → evaporator → absorber
C. Furnace → converter → evaporator
D. Converter → furnace → absorber

View Answer

Question 373

Margarine is a/an

A. Fat
B. Explosive
C. Plasticiser
D. Rocket propellant

View Answer

Question 374

Massecuite is

A. Used for paper making
B. Used as a cattle feed
C. Highly acidic in nature
D. None of these

View Answer

Question 375

Cumene is the starting material for the production of

A. Benzoic acid
B. Phenol and acetone
C. Isoprene
D. Styrene

View Answer

Question 376

Molasses is the starting material for the production of

A. Alcohol
B. Essential oil
C. Fatty acids
D. Massecuite

View Answer

Question 377

Flexible foam (for mattresses) is usually made of

A. PVC
B. Silicone
C. Polyurethanes
D. Polyamides

View Answer

Question 378

Main constituents of portland cement are calcium aluminate and

A. Gypsum
B. Silicates
C. Sodium silicate
D. Carbonates

View Answer

Question 379

A mineral is termed as 'ore', if

A. A metal can be economically extracted from it
B. It contains ≥ 40% metal
C. The metal present in it is costly
D. All of the above

View Answer

Question 380

Pick out the wrong statement.

A. High early strength cement are made from materials having high silica to lime ratio
B. The function of gypsum in cement is to enhance its initial setting rate
C. Acid resistant cements are known as silicate cement
D. Major component of greyish portland cement is tricalcium silicate

View Answer

Question 381

Which of the following is not produced on commercial scale from sea water?

A. Bromine
B. Magnesium compounds
C. Potassium compounds
D. Sodium sulphate

View Answer

Question 382

Reverse osmosis is normally used for the

A. Separation of isotopes of uranium from gaseous uranium hexaflouride
B. Separation of helium from natural gas
C. Desalination of brackish water to produce potable (drinking) water
D. Purification of oxygen

View Answer

Question 383

The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at

A. SASOL (in South Africa)
B. Redcar (U.K.)
C. Los-Angles (U.S.A.)
D. Trombay (India)

View Answer

Question 384

In an integrated steel plant, NH₃ present in coke oven gas is normally recovered as

A. (NH₄)2SO₄
B. NH₄Cl
C. (NH₄)2 NO₃
D. Liquid NH₃

View Answer

Question 385

Pick out the wrong statement.

A. Pasteurisation of milk involves moderate heating followed by cooling
B. Bakeries and breweries make use of yeasts
C. Enzyme is a complex nitrogenous compound
D. Oils and fats are alkaloids

View Answer

Question 386

Fermentation is adversely affected by the

A. Presence of air
B. Absence of air
C. High concentration
D. Presence of ammonium salts

View Answer

Question 387

Nitrogen is an essential component of

A. Mineral salts
B. Carbohydrates
C. Fats
D. Proteins

View Answer

Question 388

Starting material for the commercial production of ethyl alcohol in India is

A. Rice
B. Molasses
C. Fruit of Mahua tree
D. Maize

View Answer

Question 389

Oxidation of SO₂ to SO₃ is favoured by

A. Low temperature and low pressure
B. Low temperature and high pressure
C. High temperature and low pressure
D. High temperature and high pressure

View Answer

Question 390

Main use of liquid nitrogen is in

A. Rocket propulsion
B. Making gun powder
C. Detergent manufacture
D. Refrigerative cooling

View Answer

Question 391

Pick out the wrong statement.

A. Dry process is used for the manufacture of cement, when the raw material is blast furnace slag
B. Portland cement is made employing wet process
C. Gypsum is added to portland cement to lengthen its setting time
D. None of these

View Answer

Question 392

Na₂CO₃ is called

A. Washing soda
B. Soda ash
C. Plaster of paris
D. Calcite

View Answer

Question 393

Na₂CO₃.10H₂O is called

A. Washing soda
B. Soda ash
C. Slaked lime
D. Quicklime

View Answer

Question 394

Naphthols are derivates of

A. Methyl amine
B. Naphthalene
C. Phenol
D. Xylene

View Answer

Question 395

Which of the following has sodium bicarbonate as its main constituent ?

A. Baking soda
B. Baking powder
C. Washing soda
D. None of these

View Answer

Question 396

Dehydrogenation of isopropanol produces

A. Propyl alcohol
B. Acetone
C. Trichloroethylene
D. Formaldehyde

View Answer

Question 397

Which of the following is the second major component of cement?

A. Al₂O₃
B. SiO₂
C. CaO
D. Fe₂O₃

View Answer

Question 398

The manufacture of Kraft pulp is done by a/an __________ process.

A. Alkaline
B. Acidic
C. Neutral
D. None of these

View Answer

Question 399

Commercially ethylene is produced from naphtha by

A. Catalytic cracking
B. Catalytic dehydrogenation
C. Pyrolysis
D. Hydrocracking

View Answer

Question 400

How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln?

A. 500°C
B. 750°C
C. 1000°C
D. 1500°C

View Answer

Question 401

Pick out the wrong statement.

A. Low intensity explosives are also called propellants, whereas high intensity explosive are called detonators
B. Gun powder comprises of 75% salt petre, 15% charcoal and 10% sulphur
C. Lead azide is a popular military explosive
D. TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being

View Answer

Question 402

Neon gas is

A. Flammable in nature
B. Used in color discharge tube
C. Filled in lamps having tungsten filament
D. All of the above

View Answer

Question 403

H₂S is scrubbed from refinery gases by absorption using

A. Dilute H₂SO₄
B. Ethanol amine
C. Chilled water
D. Tri-butyl phosphate

View Answer

Question 404

Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material?

A. Slag cement
B. Glasses
C. Porcelain/Potteries
D. Teflon

View Answer

Question 405

Widely used method for the conditioning of boiler feed water is the

A. Cold lime process
B. Coagulation
C. Hot-lime soda process
D. Sequestration

View Answer

Question 406

The major constituent of black liquor generated during paper manufacture is sodium

A. Sulphate
B. Carbonate
C. Hydroxide
D. Bi-carbonate

View Answer

Question 407

Boiling of water containing temporary hardness produces

A. CO₂
B. CaSO₄
C. CaHCO₃
D. None of these

View Answer

Question 408

Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement?

A. Xanthates
B. Stearic acid
C. Calcium & aluminium stearate
D. Formic acid

View Answer

Question 409

Pick out the wrong statement.

A. Fibrillation of fibre during paper manufacture is done to develop the strength in paper
B. Alkali consumption in digestion/cooking of bamboo is measured in terms of permangnate number
C. Bagasse fibre contains both lignin & cellulose
D. Presence of sodium sulphate in pulp makes the pulp bleachability poor

View Answer

Question 410

Nicotine is

A. A volatile alkaloid
B. Obtained by treating by-products of the tobacco processing industry
C. Both A and B
D. Neither A nor B

View Answer

Question 411

The purpose of tanning in leather industry is to

A. Stiffen the leather
B. Smoothen the leather
C. Make it flexible
D. Impart water resistance

View Answer

Question 412

What products do we get on electrolysis of saturated brine using steel cathode and graphite anode in an electrolytic cell?

A. Cl₂ & Na
B. Cl₂ & H₂
C. O₂ & H₂
D. Cl₂, H₂ & NaOH solution

View Answer

Question 413

Pick out the wrong statement.

A. DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction
B. Chloral is obtained by the chlorination of ethyl alcohol
C. Insecticides acting on the insects through the respiratory system are called fumigants
D. Benzene hexachloride is not a contact insecticide

View Answer

Question 414

During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as

A. It is very corrosive at elevated temperature
B. Its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced)
C. It decomposes on further increasing the temperature
D. None of these

View Answer

Question 415

Sodium carbonate (soda ash) is not used in the manufacture of

A. Fire extinguishers
B. Sugar
C. Baking powder
D. Detergents

View Answer

Question 416

Nitric acid is not used in the manufacture of

A. Detergents
B. Fertilisers
C. Aqua regia
D. Explosives

View Answer

Question 417

The basic constituent of vegetable oils is

A. Triglyceride
B. Fatty acids
C. Fatty alcohol
D. Mono esters

View Answer

Question 418

Cellulose percentage in bamboo fibre is about

A. 10
B. 20
C. 50
D. 85

View Answer

Question 419

In premitive days, __________ was being manufactured by Leblanc Process.

A. Alum
B. Washing soda
C. Soda ash
D. Calcium carbide

View Answer

Question 420

Removal of dirt/soil by soaps or detergent does not involve the __________ of soil.

A. Emulsification
B. Dispersion
C. Precipitation
D. Wetting

View Answer

Question 421

Nylon 6-6 is manufactured from

A. Hexamethylene diamine and adipic acid
B. Hexamethylene diamine and maleic anhydride
C. Caprolactum
D. Dimethyl terephthalate and ethylene glycol

View Answer

Question 422

CO & H₂ are the constituents of

A. Producer gas
B. Water gas
C. Coke oven gas
D. All of the above

View Answer

Question 423

Polymerisation product of C₂F4 (carbon tetraflouride) is called P.T.F.E (poly chloro tetra flouro ethylene). It is also called

A. Polyurethane
B. Silicone
C. Teflon
D. Epoxy resin

View Answer

Question 424

Hydrochloric acid is also known as

A. Oil of vitriol
B. Muriatic acid
C. Strong organic acid
D. Green acid

View Answer

Question 425

Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine?

A. Na₂CO₃
B. NaHCO₃
C. H₂
D. None of these

View Answer

Question 426

Hollander beater' machine used in the paper manufacturing plant does not accomplish the task of

A. Final rolling out of paper
B. Cutting of fibres
C. Hydration of fibres
D. Fibrillation of fibre

View Answer

Question 427

Coke used for the production of calcium carbide should have

A. Low ash content
B. Low ignition temperature
C. High electrical resistivity
D. All of the above

View Answer

Question 428

In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the

A. Diamine and the ring
B. Dibasic acid and the ring
C. Diamine and the dibasic acid
D. None of these

View Answer

Question 429

Nylon-6 is manufactured from

A. Caprolactum
B. Hexamethylene diamine and adipic acid
C. Hexamethylene diamine and maleic anhydride
D. Hexamethylene diamine and sebacic acid

View Answer

Question 430

Oil is a/an

A. Mixture of glycerides
B. Mixture of glycerides of fatty acids
C. Solid at normal temperature
D. Ester of alcohols other than glycerine

View Answer

Question 431

Saponification value/number of an oil or fat is a measure of its

A. Fatty acid content
B. Degree of unsaturation of the fatty acids present in it
C. Average molecular weight
D. Insoluble fatty acid content

View Answer

Question 432

High acid value of an oil or fat is an indication of

A. Storage under improper conditions
B. Absence of unsaturation
C. Its smaller molecular weight
D. None of these

View Answer

Question 433

Oleum produces fumes of

A. SO₂
B. H₂SO₄
C. SO₃
D. SO₂ + H₂SO₄

View Answer

Question 434

Hydrogenation of oil/fat does not

A. Improve its resistance to rancid oxidation
B. Raise its melting point
C. Remove double bonds
D. None of these

View Answer

Question 435

Dry ice (solidified CO₂) is used for the

A. Storage & shipment of frozen foods and ice-creams
B. Liquefaction of permanent gases
C. Liquefaction of natural gas
D. None of these

View Answer

Question 436

Builders are added in soap to act as

A. Cleaning power booster
B. Anti-redeposition agent
C. Corrosion inhibitor
D. Fabric brightener

View Answer

Question 437

__________ is used as a catalyst in fat splitting.

A. ZnO
B. Ni
C. V₂O₅
D. FeO

View Answer

Question 438

Which one of the following is not an elastomer?

A. Polyisoperene
B. Neoprene
C. Nitrile-butadiene
D. None of these

View Answer

Question 439

Sucrose is a disaccharide consisting of

A. Glucose and glucose
B. Glucose and fructose
C. Glucose and galactose
D. Fructose and galactose

View Answer

Question 440

Unsaturated oils compared to saturated oils have

A. Lower melting point & higher reactivity to oxygen
B. Higher melting point & higher reactivity to oxygen
C. Lower melting point & lower reactivity to oxygen
D. Higher melting point & lower reactivity to oxygen

View Answer

Question 441

__________ is an ore concentrating metallurgical process involving a chemical change.

A. Electromagnetic separation
B. Froth floatation
C. Roasting
D. None of these

View Answer

Question 442

Hydrodenation of vegetable oils is a/an __________ reaction.

A. Endothermic
B. Autocatalytic
C. Exothermic
D. Homogenous

View Answer

Question 443

Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent.

A. 75
B. < 10
C. > 30
D. 50

View Answer

Question 444

Superior quality laboratory apparatus is made of the __________ glass having low thermal co-efficient of expansion & high chemical resistance.

A. Flint
B. Soda
C. Pyrex
D. Potash

View Answer

Question 445

Average sulphur content in Indian pyrites is about __________ percent.

A. 15
B. 35
C. 55
D. 70

View Answer

Question 446

DDT should not be allowed to come in contact with iron (during its manufacture) to

A. Avoid its decomposition
B. Prevent sulphonation of the monochlorobenzene by the acid catalyst
C. Achieve non-hygroscopic property
D. None of these

View Answer

Question 447

Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C.

A. 15-30
B. 90-100
C. 250-300
D. <0

View Answer

Question 448

Pick out the wrong statement.

A. Kraft method of pulp manufacture can process all types of fibrous raw materials
B. Digestion time for bagasse is less than that for wood base materials
C. Both temperature and pressure in the digestor is less in case of the sulphite method as compared to that in the sulphate method
D. None of these

View Answer

Question 449

__________ iron is the purest form of iron.

A. Cast
B. Wrought
C. Pig
D. High silicon

View Answer

Question 450

Phthalic anhydride is produced by the oxidation of

A. Naphthalene
B. Benzene
C. Toluene
D. Aniline

View Answer

Question 451

Liquefaction of gases can not be done by

A. Exchange of heat with colder stream
B. Adiabatic expansion through a throttle valve (Joule-Thomson expansion)
C. Merely compressing it beyond critical pressure
D. Adiabatic expansion against a piston or in a turbine

View Answer

Question 452

__________ process is used for producing soda ash.

A. Chamber
B. Chance
C. Tromp
D. Solvay

View Answer

Question 453

Fat dispersed in water is exemplified by

A. Colloids
B. Gel
C. Butter
D. Emulsion

View Answer

Question 454

Function of thinner in a paint is to

A. Accelerate the oxidation of oil
B. Prevent gelling of the paint
C. Suspend pigments & dissolve film forming materials
D. Form a protective film

View Answer

Question 455

Shaving soaps are

A. Soft potassium soaps (potassium salt of fatty acid) with free stearic acid to give lather a lasting property
B. Metalic soaps compounded with frothing agents
C. High free alkali soaps having excess of cane sugar and alcohol
D. None of these

View Answer

Question 456

Silicon carbide is a/an

A. Adhesive
B. Abrasive
C. Type of glass
D. Brittle material

View Answer

Question 457

Silicone is a/an

A. Thermoplastic
B. Inorganic polymer
C. Monomer
D. None of these

View Answer

Question 458

Pig iron is produced by blast furnaces in India using mostly the iron ore named

A. Hematite
B. Magnetite
C. Siderite
D. Chalcopyrite

View Answer

Question 459

__________ acid is the main constituent of cotton seed oil.

A. Acetic
B. Linoleic
C. Palmitic
D. Oleic

View Answer

Question 460

In multistage equilibrium conversion of SO₂ to SO₃ (2SO₂ + O₂ ⇋ 2SO₃), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO₂ to SO₃ can be increased by

A. Increasing the oxygen concentration
B. Putting more quantity of V₂O₅ catalyst in the converter
C. Removing some quantity of SO₃ during intermediate stage
D. Maintaining low temperature & pressure in the converter

View Answer

Question 461

Which one of the following is not likely to be a constituent of vegetable oils?

A. Citric acid
B. Oleic acid
C. Stearic acid
D. Glycerol

View Answer

Question 462

Which of the following is used as a binding material in soap to improve soap texture?

A. Rosin
B. Borax
C. Benzyl acetate
D. Sodium carbonate

View Answer

Question 463

Soaps remove dirt by

A. Increasing the surface tension
B. Decreasing wettability
C. Supplying hydrophyllic group
D. None of these

View Answer

Question 464

Main constituents of cotton fiber is

A. Lignin
B. Cellulose
C. Starch
D. Gelatine

View Answer

Question 465

Which allotrope of sulphur is insoluble in carbon disulphide?

A. Rhombic sulphur
B. Monoclinic sulphur
C. Plastic sulphur
D. Milk of sulphur

View Answer

Question 466

Solvent extracted oil

A. Has low free fatty acid content
B. Is odourless
C. Has more of unsaturates
D. None of these

View Answer

Question 467

Major component of flint glass is

A. Lead oxide
B. Silica
C. Alumina
D. Soda

View Answer

Question 468

Pick out the wrong statement.

A. Strongly caking coal should not be used in the Lurgi gasifier
B. Acetylene gas can not be used for illumination purpose
C. Water gas is called blue gas because of the color of the flame, when it is burnt
D. Gaseous fuels require less percentage of excess air for combustion as compared to liquid fuels

View Answer

Question 469

Solvay process is not used for the manufacture of potassium carbonate, because of the reason that potassium bicarbonate

A. Is prone to thermal decomposition
B. Has high water solubility and is unstable
C. Is soluble in ammonium chloride and potassium chloride solution
D. All of the above

View Answer

Question 470

Which of the following is the main constituent of the mother liquor produced in salt industry?

A. Quick lime
B. Glauber's salt
C. Salt petre
D. Bromine

View Answer

Question 471

Transparent soaps (e.g. Pears) are

A. Usually soft soap (made from coconut oil) in which cane sugar & alcohol are added and finally washed with methylated spirit to achieve transparency
B. Metallic soaps with frothing agent and free stearic acid to achieve transparency
C. Metallic soaps with frothing agent from which glycerine has not been recovered
D. None of these

View Answer

Question 472

Most widely and commonly used coagulant for the removal of suspended impurities in water is

A. Bleaching powder
B. Slaked lime
C. Alum
D. Copper sulphate

View Answer

Question 473

Claude process of gas liquefaction employs

A. Merely compression of gas beyond its critical pressure
B. Joule-Thomson expansion cooling
C. Heat exchange with colder stream
D. Adiabatic expansion against a piston or in a turbine

View Answer

Question 474

Process conditions in fermentator used for production of penicillin is

A. 25°C, 2 atm
B. 50°C, l0 atm
C. 30°C, 200 mm Hg (absolute)
D. 90°C, 45 atm

View Answer

Question 475

Linde process of gas liquefaction employs

A. Exchange of heat with colder stream
B. Adiabatic expansion through a throttle valve (Joule-Thomson expansion)
C. Adiabatic expansion against a piston or in a turbine
D. Merely compressing the gas beyond its critical pressure

View Answer

Question 476

Production of alcohol by fermentation of molasses is an __________ process.

A. Anaerobic
B. Aerobic
C. Endothermic
D. Both B and C

View Answer

Question 477

Ordinary glass is not a/an

A. Amorphous isotropic material
B. Supercooled liquid
C. Material with sharp definite melting point
D. Electrical insulator

View Answer

Question 478

Nickel is not used as a catalyst in the __________ reaction.

A. Shift conversion
B. Oil hydrogenation
C. Steaming reforming of naphtha
D. Ammonia cracking/dissociation

View Answer

Question 479

Main constituents of natural rubber is

A. Polystyrene
B. Polyisoprene
C. Polybutadiene
D. Polychloroprene

View Answer

Question 480

Absorption of SO₃ in 97% H₂SO₄ is

A. Exothermic
B. Endothermic
C. Not possible
D. None of these

View Answer

Question 481

The type of high refractive index glass used in optical instruments is __________ glass.

A. Pyrex
B. Flint
C. Crookes
D. None of these

View Answer

Question 482

The most reactive allotropic form of phosphorus is __________ phosphorus.

A. Red
B. Yellow
C. Violet
D. Black

View Answer

Question 483

Sucrose is a

A. Monosacchride
B. Disacchride
C. Polysacchride
D. None of these

View Answer

Question 484

Phosphoric acid is prepared from

A. Cryolite
B. Chalcopyrite
C. Rock phosphate
D. None of these

View Answer

Question 485

Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like

A. High cost
B. Fragile nature
C. Easy poisoning tendency
D. All of the above

View Answer

Question 486

Hydrogen gas is not produced commercially (for nitrogeneous fertiliser manufacture) by

A. Iron-steam reaction
B. Electrolysis of water
C. Steam reforming of naphtha
D. Its cryogenic separation from coke oven gas

View Answer

Question 487

Synthesis gas is a mixture of

A. CO and H₂
B. N₂ and H₂
C. H₂, CH₄ and CO
D. CO₂ and H₂

View Answer

Question 488

Sea water contains about __________ ppm of bromine.

A. 5
B. 70
C. 500
D. 1700

View Answer

Question 489

Systemic insecticides

A. Are absorbed throughout the plant
B. Kill insects following external bodily contact
C. Are stomach poisons
D. Emit poisonous vapour

View Answer

Question 490

__________ is not a constituent of gun powder.

A. Carbon
B. Charcoal
C. Sulphur
D. Potassium nitrate

View Answer

Question 491

Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.

A. -83
B. -183
C. -196
D. -218

View Answer

Question 492

Air used in aerobic fermentation must be sterilized, otherwise the

A. Recovery of product will be difficult
B. Contamination of pure culture would result
C. Uniformity of product cannot be achieved
D. None of these

View Answer

Question 493

Purity of oxygen used for blowing in steel making L.D. converter is 99.5%. The boiling point of oxygen is about __________ °C.

A. -53
B. -103
C. -183
D. -196

View Answer

Question 494

Alum [Al2(SO₄)₃] is used as a coagulant in water treatment to remove

A. Colour
B. Turbidity
C. Bacteria
D. All of the above

View Answer

Question 495

Parathion and Malathion are

A. Pesticides
B. Plasticisers for unsaturated polysters
C. Pain-relieving drugs (analgesic)
D. Tranquilisers

View Answer

Question 496

Glauber's salt is chemically represented by

A. Na₂SO₄.10H₂O
B. CaCl(OCl)
C. CaSO₄.H₂O
D. (NH₄)₂SO₄

View Answer

Question 497

Vegetable oils contain large quantity of glycerides of unsaturated acids. When the vegetable oils contain high amount of saturated fatty acids, it is termed as __________ oil.

A. Drying
B. Semi-drying
C. Non-drying
D. None of these

View Answer

Question 498

Pasteurisation of milk means

A. Removal of fatty and albuminous substance from it
B. Killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics
C. Inhibiting the growth of micro-organisms without killing them
D. None of these

View Answer

Question 499

An alkali metal salt of palmitic acid is known as

A. Soap
B. Metallic soap
C. Detergent
D. Alkaloid

View Answer

Question 500

Which form of sulphur is the most stable at room temperature?

A. Plastic
B. Monoclinic
C. Rhombic
D. Flowers of sulphur

View Answer

Question 501

Argon is the third largest constituent of air (followed by N₂ & O₂). Its percentage by volume in air is

A. 0.14
B. 0.34
C. 0.94
D. 1.4

View Answer

Question 502

Alcohol percentage in molasses may be around

A. 10
B. 40
C. 70
D. 85

View Answer

Question 503

Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its

A. Poor oxidation stability and high gum forming tendency
B. Greater tendency of decomposition at elevated temperature
C. Hydrolysis tendency in presence of water
D. All of the above

View Answer

Question 504

Pick out the true statement pertaining to water treatment.

A. Slow sand filters can remove colour completely
B. Activated carbon can be used for taste & odour control without subsequent filtration
C. Application of activated carbon reduces the temporary hardness of water
D. Normally, the turbidity is removed by adding a coagulent prior to sedimentation

View Answer

Question 505

Pick out the false statement pertaining to water treatment.

A. Aeration of water is effective in CO₂ removal
B. The zeolite water softening process reduces the hardness of water by not more than 50%
C. Sodium sulphate or sodium carbonate do not cause hardness in water
D. Water with pH value less than 7, is acidic

View Answer

Question 506

Triple superphosphate is manufactured by reacting

A. Phosphate rock with phosphoric acid
B. Phosphate rock with sulphuric acid
C. Phosphate rock with nitric acid
D. Ammonium phosphate with phosphoric acid

View Answer

Question 507

Teflon is

A. Phenol formaldehyde
B. An inorganic polymer
C. Poly tetrafluoroethylene (P.T.F.E.)
D. A monomer

View Answer

Question 508

In sulphate pulp manufacture, the pressure and temperature in the digestor is

A. 10 atm., 800 °C
B. 10 atm., 170-180°C
C. 1 atm., 170 - 180°C
D. L atm., 800°C

View Answer

Question 509

Drinking (potable) water treatment does not involve

A. Coagulation
B. Sedimentation
C. Softening
D. Disinfection

View Answer

Question 510

Phenol is mainly used

A. To produce benzene
B. To produce phenol formaldehyde
C. To produce polyester resin
D. As a plasticiser for unsaturated polyster

View Answer

Question 511

Sodium salt of higher molecular weight fatty acid is termed as the __________ soap.

A. Hard
B. Soft
C. Metallic
D. Lubricating

View Answer

Question 512

Pick out the wrong statement.

A. Azoic dyes are mostly applied on cotton fabrics
B. Basic dyes (e.g. amino derivatives) are applied mostly to paper
C. Mordant dyes are applied mainly to wools
D. None of these

View Answer

Question 513

Plaster of Paris is

A. CaSO₄.½H₂O
B. Used for setting of broken bones
C. Both A and B
D. Same as gypsum

View Answer

Question 514

The chamber process is

A. Preferred over contact process for producing 98 to 100% H₂SO₄ and various oleums
B. Non-catalytic and operates only on pyrites
C. A batch process for directly producing high strength (98 to 100%) H₂SO₄
D. None of these

View Answer

Question 515

A cane sugar factory having sugar production rate of 10 tons/day will produce about __________ tons/day of bagasse (after consumption by the factory for heating etc.).

A. 1
B. 10
C. 25
D. 40

View Answer

Question 516

Cement setting under water employs a/an __________ process.

A. Hydration
B. Decomposition
C. Oxidation
D. Reduction

View Answer

Question 517

Which of the following is a detergent?

A. Benzene hexachloride
B. Alkyl benzene sulphonate
C. Polytetraflouroethylene
D. Cellulose nitrate

View Answer

Question 518

Which of the following is a detergent?

A. Fatty alcohol
B. Alkyl benzene sulphonate (ABS)
C. Fatty acids
D. Methylene chloride

View Answer

Question 519

Extraction of __________ employs an electrolytic process.

A. Aluminium
B. Silver
C. Copper
D. All of the above

View Answer

Question 520

The main use of HCl is in the

A. Drilling of petroleum wells and pickling of steel sheets
B. Manufacture of cationic detergent
C. Treatment of spent fuel of nuclear reactor
D. None of these

View Answer

Question 521

The major use of butadiene is

A. As a plasticiser for unsaturated polyester
B. In the manufacture of synthetic rubber
C. As an anti-skinning agent in paint
D. None of these

View Answer

Question 522

Synthesis gas' meant for the synthesis of organic compound is a variable mixture of

A. N₂ & H₂
B. CO₂ & H₂
C. CO & H₂
D. C & H₂

View Answer

Question 523

One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to

A. Adjust the pH of the syrup
B. Remove the coloring matter from the syrup
C. Reduce the viscosity of the syrup
D. Improve the rate of crystallisation of sugar

View Answer

Question 524

The most commonly used substance to speed up the sedimentation of sewage is

A. Lime
B. Sulphuric acid
C. Chlorine
D. Sodium bisulphite

View Answer

Question 525

Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of

A. Nitric acid
B. Sulphuric acid
C. Ammonium sulphate
D. Hydrochloric acid

View Answer

Question 526

Thermoplastic materials

A. Do not soften on application of heat
B. Are heavily branched molecules
C. Are solvent insoluble
D. None of these

View Answer

Question 527

Le-Blanc process is a primitive process for the manufacture of

A. Caustic soda
B. Soda ash
C. Bromine from sea water
D. Hydrochloric acid

View Answer

Question 528

Thorium is mainly used

A. For the manufacture of gas mantles
B. As a fissile fuel in a nuclear reactor
C. In the manufacture of hydrogen bomb
D. In the treatment of cancer

View Answer

Question 529

A 'unit process' is exemplified by the

A. Distillation
B. Hydrogenation of oils
C. Absorption
D. Humidification

View Answer

Question 530

Oil produced by solvent extraction

A. Has low free fatty acid content
B. Is odourless
C. Both A & B
D. Neither A nor B

View Answer

Question 531

Poly tetraflouro ethylene (P.T.F.E.) is known as

A. Bakelite
B. Teflon
C. Celluloid
D. Decron

View Answer

Question 532

Zeolite is a/an

A. Naturally occuring clay which is capable of exchanging cations
B. Abrasive material
C. Catalyst used in shift conversion
D. None of these

View Answer

Question 533

Conversion of SO₂ to SO₃ in Monsanto 4-pass converter is about __________ percent.

A. 80
B. 90
C. 98
D. 100

View Answer

Question 534

Synthetic glycerine is produced from

A. Toluene
B. Phenol
C. Propylene
D. Naphthalene

View Answer

Question 535

Dehydrogenation of ethyl benzene produces

A. Styrene
B. Naphthalene
C. Phenol
D. Benzoic acid

View Answer

Question 536

L.D. converter is used in the production of

A. Pig iron
B. Steel
C. Copper
D. Zinc

View Answer

Question 537

Pick out the wrong statement pertaining to solvent extraction of oil.Rate of extraction

A. Decreases with decrease of thickness of the flakes
B. Increases with the increasing flake size keeping the flake thickness constant
C. Increases Considerably with the rise of temperature
D. Decreases as the moisture content of flakes increases

View Answer

Question 538

90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at __________ °C.

A. <0
B. 10-30
C. 250-280
D. 500-600

View Answer

Question 539

Catalyst used in the oxidation of benzene to produce maleic anhydride is

A. V₂O₅
B. Pt
C. Ni
D. Cr

View Answer

Question 540

Setting of plaster of paris is accompanied with

A. Hydration
B. Dehydration
C. Hydrolysis
D. Loss of CO₂

View Answer

Question 541

The enzyme which converts starch into the disacharides maltose is

A. Diastase
B. Maltase
C. Yeast
D. None of these

View Answer

Question 542

Trinitro-toluene (TNT) is

A. Used in glycerine manufacture
B. An explosive
C. Used in dye manufacture
D. None of these

View Answer

Question 543

With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide

A. Increases
B. Increases linearly
C. Decreases
D. Decreases linearly

View Answer

Question 544

Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used

A. As a lubricant
B. As a rust preventive
C. In hard water for cleaning of cloth
D. As a foam depressant in distillation column

View Answer

Question 545

Shrinkage volume in cement setting does not depend upon the

A. Sand to cement ratio
B. Water to cement ratio
C. Ambient temperature fluctuation
D. Drying period

View Answer

Question 546

Hydrazine is used in water treatment for the removal of

A. Colloidal impurities
B. Dissolved oxygen
C. Turbidity
D. Chlorinous taste

View Answer

Question 547

Maleic anhydride is produced by catalytic oxidation of

A. Toluene
B. Ethyl alcohol
C. Naphthalene
D. Benzene

View Answer

Question 548

Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C.

A. -5 to 0
B. 5 to 10
C. 30 to 50
D. 75 to 80

View Answer

Question 549

Which of the following is not a product of coal tar distillation?

A. Anthracene
B. Cresote oil
C. Carbolic oil
D. None of these

View Answer

Question 550

Chloramines are used in water treatment for

A. Disinfection and control of taste & odour
B. Corrosion control
C. Removing turbidity
D. Control of bacteria

View Answer

Question 551

Pick out the endothermic reaction out of the following.

A. C+1/2O₂ = CO
B. CO + 3H₂ = CH₄ + H₂O
C. CaCO₃ = CaO + CO₂
D. CO +1/2O₂ = CO₂

View Answer

Question 552

Pick out the exothermic reaction out of the following:

A. C + H₂O = CO + H₂
B. CaC₂ + H₂O = Ca(OH)₂ + C₂H₂
C. MgCO₃ = MgO + CO₂
D. All of the above

View Answer

Question 553

Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it

A. Has larger production capacity per unit cell
B. Consumes less power per ton of Cl₂ produced
C. Produces high purity (70%) caustic soda directly
D. All of the above

View Answer

Question 554

Grignard reagent is chemically known as

A. Ethyl magnesium chloride
B. Methyl magnesium chloride
C. Dichlorophenol
D. Monochloro acetic acid

View Answer

Question 555

Pick out the wrong statement.

A. Cold rubber (SBR) is superior as compared to hot rubber (SBR)
B. Polymerisation temperature can modify the properties of SBR
C. Production of cold SBR employs lower pressure as compared to that of hot SBR
D. None of these

View Answer

Question 556

__________ of quicklime produces slaked lime.

A. Hydration
B. Dehydration
C. Hydrogenation
D. None of these

View Answer

Question 557

Out of the following processes of paper pulp manufacture, the maximum corrosion problem in digestion & handling equipments is encountered in the __________ process.

A. Mechanical
B. Sulphate/kraft
C. Sulphite
D. Neutral sulphite semi-chemical

View Answer

Question 558

Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils

A. Cause cholesterol build up and blood clotting
B. Are prone to rancid oxidation
C. Always contain some amount of nickel (as their complete removal is very difficult)
D. Have affinity to retain harmful sulphur compounds

View Answer

Question 559

Which of the following fuel gases contains maximum amount of carbon monoxide?

A. Coke oven gas
B. Water gas
C. Blast furnace gas
D. L.D. converter gas

View Answer

Question 560

Styrene butadiene rubber (SBR) is

A. A natural rubber
B. A synthetic polymer
C. A synthetic monomer
D. Another name of silicone rubber

View Answer

Question 561

Potassium is kept & transported under

A. Water
B. Liquid ammonia
C. Kerosene oil
D. Alcohol

View Answer

Question 562

Starting material for the production of styrene butadiene rubber (SBR) is

A. Ethyl alcohol
B. Ethylene
C. Both A & B
D. Neither A nor B

View Answer

Question 563

Permanent hardness of water is due to the presence of calcium & magnesium

A. Bi-carbonates
B. Sulphates & chlorides
C. Carbonate
D. None of these

View Answer

Question 564

Riboflavin is a/an

A. Vitamin
B. Analgesic drug
C. Anaesthetics
D. Anti-malarial drug

View Answer

Question 565

Yellow glycerine is made into white, using

A. Activated carbon
B. Diatomaceous earth
C. Bauxite
D. Bentonite

View Answer

Question 566

Percentage of glycerene present in the spent lye obtained during soap manufacture is about

A. 0.5
B. 5
C. 20
D. 35

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Question 567

Gun powder, which is an explosive comprises of charcoal, sulphur and

A. Glycerene
B. Salt petre
C. Nitro glycerene
D. Dynamite

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Question 568

Proximate analysis of coal determines its __________ content.

A. Moisture, ash, sulphur & volatile matter
B. Moisture & volatile matter
C. Moisture, sulphur, nitrogen & fixed carbon
D. None of these

View Answer

Question 569

Ultimate analysis of coal determines its __________ content.

A. Carbon, hydrogen, nitrogen & sulphur
B. Carbon, ash, sulphur & nitrogen
C. Carbon, sulphur, volatile matter & ash
D. Carbon, volatile matter, ash & moisture

View Answer

Question 570

A substance produced by a living organism and capable of anti-microbial activity is called a/an

A. Antibiotic
B. Antiseptic
C. Disinfectant
D. None of these

View Answer

Question 571

Producer gas consists mainly of

A. CO, CO₂ N₂, H₂
B. CO, H₂
C. H₂, CH₄
D. C₂H₂, CO₂, H₂

View Answer

Question 572

Pick out the wrong statement.

A. Hard glass which is used for making laboratory glass wares is a mixture of sodium borosilicate and aluminium borosilicate
B. Glass is decolorised during its manufac-ture by adding antimony oxide, mangnese dioxide or arsenic oxide
C. Ordinary glass is represented chemically by Na₂O . CaO . 6SiO₂
D. Red color is imparted to glass by addition of arsenic oxide

View Answer

Question 573

Commercial production of calcium carbide requires limestone and __________ as raw materials.

A. Coke
B. Sand
C. Soda ash
D. Fuel oil

View Answer

Question 574

Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on

A. Slaked lime
B. Soda lime
C. Calcium perchlorate
D. None of these

View Answer

Question 575

Good quality of edible salt is obtained from brine by the process of

A. Solar evaporation
B. Vacuum evaporation
C. Freeze drying
D. Electrolysis

View Answer

Question 576

Carboxymethyl cellulose (CMC) is added in detergents to act as a/an

A. Surfactant
B. Builder
C. Optical brightening agent
D. Anti soil redeposition agent

View Answer

Question 577

Enzymes are organic catalysts used in the __________ reactions.

A. Chemical
B. Biochemical
C. Photochemical
D. Electrochemical

View Answer

Question 578

The catalyst used in the manufacture of DDT is

A. Alumina
B. Silica
C. 20% oleum
D. Aluminium chloride

View Answer

Question 579

Sulphuric acid saturated with SO₃ is called

A. Concentrated H₂SO₄
B. Sulphurous acid
C. Oleum
D. None of these

View Answer

Question 580

Diaphragm electrolytic cell as compared to mercury electrolytic cell

A. Produces 70% NaOH solution
B. Requires less specific power consumption for the production of chlorine
C. Requires lesser investment for similar capacity
D. All of the above

View Answer

Question 581

Nylon-6 as compared to Nylon-66 is having higher

A. Hardness
B. Abrasion/resistance
C. Melting point
D. None of these

View Answer

Question 582

Dacron is a

A. Condensation product of hexam-ethylene diamine and adipic acid
B. Thermosetting material
C. Condensation product of dimethyl terephthalate and ethylene glycol
D. None of these

View Answer

Question 583

Dacron is a/an

A. Polyester
B. Unsaturated polyster
C. Polyamide
D. Inorganic polymer

View Answer

Question 584

Catalytic oxidation of naphthalene produces

A. Styrene
B. Phenol
C. Phthalic anhydride
D. None of these

View Answer

Question 585

DDT stands for

A. Diethyl-diphenyl-trichloromethane
B. Dichloro-diphenyl-trichloromethane
C. Diphenyl-dichloro-trichloromethane
D. Dichloro-diphenyl-trichloroethane

View Answer

Question 586

Economics of 'Solvay Process' depends upon the efficiency of

A. Carbonating tower
B. Ammonia recovery
C. Ammonia recovery and size of the plant
D. Ammoniation of salt solution

View Answer

Question 587

Pick out the wrong statement. Iodine value of an oil or fat is

A. The number of grams of iodine taken up by 100 gm of oil or fat
B. A measure of its unsaturation
C. Helpful in findings its adulteration & its suitability for making soap
D. Independent of the type of oil, whether it is drying or non-drying

View Answer

Question 588

Presence of sodium tripolyphosphate (an additive) in synthetic detergent

A. Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)
B. Inhibits its corrosive effects
C. Does not allow redeposition of dirt on the cleaned surface
D. None of these

View Answer

Question 589

Use of hydrated lime in water treatment

A. Before filtration, reduces the bacterial load on filters
B. After filtration, combats the corrosive-ness of water due to the presence of O₂ & CO₂
C. Is to adjust the pH value
D. All of the above

View Answer

Question 590

Nitrile rubber is produced by the polymerisation of

A. Acrylonitrile and butadiene
B. Acrylonitrile and styrene
C. Isobutylene and isoprene
D. None of these

View Answer

Question 591

Helium is produced on commercial scale from

A. Air
B. Natural gas
C. Coke oven gas
D. None of these

View Answer

Question 592

__________ is used as a flux in the extraction of iron from iron ore (hametite) in blast furnace.

A. Bauxite
B. Limestone
C. Quartz
D. Manganese

View Answer

Question 593

Ore concentration by froth floatation utilises the __________ of ore particles.

A. Density difference
B. Wetting characteristics
C. Terminal velocities
D. None of these

View Answer

Question 594

Separation of fresh water from sea water can be done by the __________ operation.

A. Osmosis
B. Reverse osmosis
C. Absorption
D. Adsorption

View Answer

Question 595

Bisphenol A is produced by the condensation of acetone with

A. Formaldehyde
B. Ethyl alcohol
C. Diethyl ether
D. Phenol

View Answer

Question 596

Which of the following is a disacchride?

A. Sucrose
B. Glucose
C. Starch
D. Maltose

View Answer

Question 597

Sucrose content in the raw juice extracted from sugar cane is about __________ percent.

A. 1 - 2
B. 15 - 20
C. 50 - 60
D. 80 - 85

View Answer

Question 598

Salt cake is chemically represented by

A. Na₂SO₄
B. CaSO₄.1/2 H₂O
C. MgSO₄
D. BaSO₄

View Answer

Question 599

Prussian blue is chemically represented by

A. FeO.TiO₂
B. Ca SO₄ . 2H₂O
C. Fe₄ [Fe (CN₆)₃]
D. AlF₃ . 3NaF

View Answer

Question 600

Flash point of most vegetable oils is about __________ °C.

A. 50
B. 100
C. 200
D. 300

View Answer

Question 601

In the Solvay process, the product from the calciner is

A. Light soda ash
B. Dense soda ash
C. Sodium bicarbonate
D. Dehydrated soda ash

View Answer

Question 602

Magnesium and calcium __________ cause temporary hardness of water.

A. Carbonates
B. Bicarbonates
C. Phosphates
D. Sulphates

View Answer

Question 603

Styrene (a monomer for the production of polystyrene) is commercially produced by

A. Catalytic dehydrogenation of ethyl benzene
B. Dehydration of ethyl alcohol followed by hydrogenation
C. Reacting ethylene oxide with acetal-dehyde
D. Fermentation of starch

View Answer

Question 604

Mercury cells for caustic soda manufacture, compared to diaphragm cells

A. Require lower initial investment
B. Require more power
C. Produce lower concentration NaOH
D. None of these

View Answer

Question 605

Trinitrotoluene (TNT), an explosive, is made by the nitration of

A. Nitrobenzene
B. Toluene
C. Nitrotoluene
D. Benzene

View Answer

Question 606

__________ of rubber decreases after its vulcanisation.

A. Resistance to the action of organic solvent
B. Tackiness
C. Maximum service temperature
D. Tensile strength

View Answer

Question 607

The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to

A. Avoid mechanical weakening of fibre
B. Remove lignin by way of crystallisation
C. Increase the cellulose content
D. None of these

View Answer

Question 608

Rosin soap is added during paper manufacture to

A. Impart adhesive properties
B. Improve opacity
C. Impart resistance to penetration by liquids
D. None of these

View Answer

Question 609

Sulphuric acid is mainly used in the __________ industry.

A. Fertiliser
B. Steel
C. Paper
D. Paint

View Answer

Question 610

Massacuits is a terminology used in the __________ industry.

A. Paint
B. Oil hydrogenation
C. Soap
D. Sugar

View Answer

Question 611

Most commonly used rubber vulcanising agent is

A. Sulphur
B. Bromine
C. Platinum
D. Alumina

View Answer

Question 612

Blue colour is imparted to glass by the addition of

A. FeSO₄
B. PbO
C. CaO
D. NaOH

View Answer

Question 613

Oils and fats are converted to soap in a process called

A. Hydrogenation
B. Esterification
C. Saponification
D. None of these

View Answer

Question 614

Sea weeds are an important source of

A. Fluorine
B. Chlorine
C. Bromine
D. Iodine

View Answer

Question 615

Direct conversion of chemical energy into electrical energy is done in a

A. Magnetohydrodynamic (MHD) generator
B. Fuel cell
C. Fast breeder reactor
D. None of these

View Answer

Question 616

Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.

A. 7-14 and 14-30
B. 7-14 and 40-50
C. 14 - 30 and 40-50
D. 10 - 20 and 40 - 50

View Answer

Question 617

Resistance to fusion of the refractory under a steady rising temperature condition is called

A. Spalling
B. Refractoriness
C. Both A & B
D. Neither A nor B

View Answer

Question 618

Enamels

A. Give good glossy finish
B. Are same as varnish
C. Are prepared from non-drying oil
D. Do not contain pigment

View Answer

Question 619

The most widely used coagulant for removing suspended impurities from water is

A. Bleaching powder
B. Chlorine
C. Calcium sulphate
D. Alum

View Answer

Question 620

Isopropyl benzene produced by alkylation of benzene with propylene is known as

A. Neoprene
B. Cumene
C. Gelatin
D. Mercaptans

View Answer

Question 621

Coloured glass is obtained by mixing of colored salts. Addition of __________ oxide is done to impart greenish blue color to the glass.

A. Chromium
B. Arsenic
C. Copper
D. Mangnese

View Answer

Question 622

A bio-catalyst produced by living cells which acts independent of the cell is called a/an

A. Substrate
B. Enzyme
C. Nutrient
D. None of these

View Answer

Question 623

Pick out the wrong statement pertaining to nitric acid.

A. About 90% of nitric acid is manufactured by Ostwald
B. It is a strong mono basic acid which reacts with almost all the metals except noble metals
C. Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO₂)
D. Arc process of nitric acid manufacture is economical as compared to Ostwald

View Answer

Question 624

Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulphonic acid produces sodium dodecylbenzene sulphate, which is a/an

A. Explosive
B. Soap
C. Detergent
D. Analgesic drug

View Answer

Question 625

Enzymes are

A. Proteins with high molecular weight (around 10, 000)
B. Derived from living organisms
C. Catalyst for temperature sensitive reactions
D. All of the above

View Answer

Question 626

Neoprene is chemically known as

A. Polybutadiene
B. Styrene butadiene rubber (SBR)
C. Polyurathane
D. Polychloroprene

View Answer

Question 627

Epoxy resin

A. Is a good adhesive
B. Is an elastomer
C. Cannot be used for surface coatings
D. Is a polyester

View Answer

Question 628

Anion exchanger is regenerated usually with

A. NaOH
B. H₂SO₄
C. Hydrazine
D. Alum solution

View Answer

Question 629

Cation exchanger is regenerated usually with

A. NaOH
B. H₂SO₄
C. Hydrazine
D. Alum solution

View Answer

Question 630

Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the

A. Fertiliser manufacture
B. Car battery solution
C. Synthesis of oleum
D. Water treatment

View Answer

Question 631

Glycerine is recovered from lye by

A. Evaporation followed by vacuum distillation
B. Liquid extraction technique
C. Extractive distillation technique
D. None of these

View Answer

Question 632

Conversion of CO to CO₂ by steam in presence of a catalyst is called

A. Steam reforming
B. Shift conversion
C. Steam gasification
D. None of these

View Answer

Question 633

__________ are added in lacquers to remove film brittleness and to improve adhereness.

A. Film forming materials
B. Plasticisers
C. Diluents
D. Solvents

View Answer

Question 634

Temporary hardness of water can be removed by

A. Addition of alum (a coagulant)
B. Boiling
C. Filtration (through gravity sand filter)
D. Addition of lime

View Answer

Question 635

Permanent hardness of water can be removed by

A. Simply boiling
B. Adding alum
C. Passing it through cation & anion exchangers
D. All of the above

View Answer

Question 636

Permanent hardness of water can be removed by

A. Boiling
B. Adding Ca(OH)₂
C. Boiling it with Na₂CO₃
D. None of these

View Answer

Question 637

Permanent hardness of water can be removed by

A. Addition of soda ash to it
B. Treating it with zeolites
C. Passing it through sodium hexametaphosphate
D. All of the above

View Answer

Question 638

Esterification reaction

A. Produces soap
B. Is reversible
C. Is a reaction between an alcohol and an organic acid
D. All of the above

View Answer

Question 639

The process used for the manufacture of ethyl alcohol from molasses is

A. Distillation
B. Dehydration
C. Dehydrogenation
D. None of these

View Answer

Question 640

Raw materials required for the manufacture of __________ is acetylene and hydrochloric acid.

A. Phthalic anhydride
B. Vinyl chloride
C. Maleic anhydride
D. Dacron

View Answer

Question 641

Thermal pyrolysis of ethylene dichloride produces

A. Trichloroethylene
B. Vinyl chloride
C. Ethanol amine
D. Ethylene oxide

View Answer

Question 642

Concentration of hydrogen peroxide is done by

A. Crystallisation
B. Vacuum crystallisation
C. Atmospheric distillation
D. Dehydration

View Answer

Question 643

Cellulose content of bamboo and ideal fibrous raw material for the manufacture of paper is __________ percent.

A. 10
B. 50
C. 80
D. 95

View Answer

Question 644

Molecular weights of polymers are in the range of

A. 10² - 10²
B. 10⁵ - 10⁹
C. 10² - 10⁷
D. 10⁹ - 10¹¹

View Answer

Question 645

Which of the following is not required in the manufacture of soda ash by Solvay process?

A. Ammonia
B. Limestone
C. Nitric acid
D. None of these

View Answer

Question 646

Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process?

A. NH?
B. NaCl
C. CaO
D. Coke

View Answer

Question 647

Which of the following is the purest form of water out of the following ?

A. Underground water
B. Rain water
C. Well water
D. Lake water

View Answer