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
Question 2
All enzymes are made of
A. fats
B. carbohydrates
C. proteins
D. amino acids
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.
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
Question 5
Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.
A. 10
B. 25
C. 50
D. 98
Question 6
Epoxy resin
A. is a good adhesive.
B. is an elastomer.
C. cannot be used for surface coatings.
D. is a polyester.
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).
Question 8
Esterification reaction produces
A. detergent
B. vanaspati
C. soap
D. mercaptans
Question 9
Frasch process is for
A. making oxygen
B. producing helium
C. mining sulphur
D. making nitrogen
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.
Question 11
Fusion of bauxite and __________ produces high alumina cement.
A. alum
B. limestone
C. coke
D. quartz
Question 12
Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of
A. callagen
B. tannin
C. molasses
D. carbohydrate
Question 13
Gun powder, which is an explosive comprises of charcoal, sulphur and
A. glycerene
B. salt petre
C. nitro glycerene
D. dynamite
Question 14
Haemoglobin is a/an
A. amino acid
B. biological catalyst
C. protein
D. enezyme
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).
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
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.
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).
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).
Question 20
Neoprene is the trade name of
A. polyurathane
B. phenol formaldehyde
C. polychloroprene
D. styrene-butadiene rubber
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.
Question 22
Paper pulp produced by kraft/sulphate process is
A. bleached easily
B. dull white in color
C. strong fibrous
D. dark colored
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.
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)
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
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).
Question 27
Polycaprolactum is commercially known as
A. nylon-6
B. nylon-66
C. dacron
D. rayon
Question 28
Producer gas consists mainly of
A. CO, CO2 N2, H2
B. CO, H2
C. H2, CH4
D. C2H2, CO2, H2
Question 29
Raw materials used for producing __________ cement does not contain iron oxide.
A. waterproof
B. slag
C. white
D. pozzolan
Question 30
Salt cake is chemically represented by
A. Na2SO4
B. CaSO4.H2O
C. MgSO4
D. BaSO4
Question 31
Starting raw material for the manufacture of alum is
A. alumina
B. gypsum
C. bauxite
D. ammonium bicarbonate
Question 32
Styrene is produced from ethyl benzene by the process of
A. dehydrogenation
B. oxidation
C. alkylation
D. dehydration
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).
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
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.
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
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.
Question 38
The combustion reaction, C + O2 = CO2, is
A. exothermic
B. endothermic
C. autocatalytic
D. none of these
Question 39
The drug used in contraceptives is
A. sulphadizene
B. mestranol
C. methyl salicylate
D. pencillin
Question 40
The gasification reaction represented by, C + H2O = CO + H2, is a/an __________ reaction.
A. exothermic
B. endothermic
C. catalytic
D. autocatalytic
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.
Question 42
Very fine suspended and colloidal impurities are removed from water by a process called
A. sedimentation
B. coagulation
C. disinfection
D. softening
Question 43
Viscose rayon is chemically
A. cellulose nitrate
B. regenerated cellulose nitrate
C. cellulose acetate
D. regenerated cellulose acetate
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
Question 45
Which of the following is an organo-metal-lic compound ?
A. Isopropyl alcohol
B. Tetra-ethyl lead
C. Zeolite
D. Cumene
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
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.
Question 48
Which of the following sugars is the sweetest?
A. Glucose
B. Fructose
C. Sucrose
D. Lactose
Question 49
Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials.
A. adsorbs
B. oxidises
C. reduces
D. converts
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.
Question 51
A mixture of chlorine & sodium bromide acts as a/an
A. Insecticides
B. Analgesic drug
C. Fire retardant
D. Hydrogenation catalyst
Question 52
__________ are used as corrosion inhibitor for iron & steel in aqueous solutions.
A. Phosphates
B. Chromates
C. Sulphates
D. Bi-carbonates
Question 53
Hydrazine (N₂H₄) is used mainly as a/an
A. Explosive
B. Rocket fuel
C. Detergents additive
D. None of these
Question 54
Common salt is generally not produced commonly by __________ method from brine.
A. Freeze drying
B. Electrolytic
C. Solar evaporation
D. Vacuum evaporation
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
Question 56
Paper grade bamboo contains about __________ percent cellulose.
A. 5
B. 20
C. 40
D. 60
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
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
Question 59
Fish contains about __________ percent oil.
A. 5
B. 10
C. 20
D. 35
Question 60
Phenolic antiseptics are added in the __________ soap.
A. Shaving
B. Medicated
C. Metallic
D. Transparent
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
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
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
Question 64
Electric bulbs are made of __________ glass.
A. Jena
B. Flint
C. Crookes
D. Pyrex
Question 65
__________ is produced using molasses as the starting raw material.
A. Methyl alcohol
B. Ethyl alcohol
C. Benzol
D. Dimethyl ether
Question 66
Sucrose content in cane sugar may be around __________ percent.
A. 50
B. 70
C. 80
D. 95
Question 67
Percentage of alcohol in beer may be around __________ percent.
A. 2-8
B. 18-23
C. 27-32
D. 1-4
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
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
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
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
Question 72
Which of the following is not produced commercially from sea water?
A. Magnesium & potassium compounds
B. Common salt
C. Bromine
D. Iodine
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
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
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)
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
Question 77
A unit operation is exemplified by the process of
A. Reduction
B. Desorption
C. Nitration
D. Combustion
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
Question 79
Which of the following is an ore of iron?
A. Galena
B. Chalcopyrite
C. Hematite
D. Bauxite
Question 80
Dichloro diphenyl __________ is the full form of DDT (an insecticide).
A. Tetrachloroethane
B. Trichloroethane
C. Tetrachloromethane
D. Trichloromethane
Question 81
Which of the following processes is absent in glass manufacturing process?
A. Sintering
B. Annealing
C. Shaping or forming
D. Melting
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
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
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
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
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
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
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
Question 89
__________ acid is an unsaturated fatty acid.
A. Palmitic
B. Oleic
C. Stearic
D. Oxalic
Question 90
Carbon content of pitch (residue of coal tar distillation) is around __________ percent.
A. 70
B. 55
C. 80
D. 94
Question 91
Alum is commercially produced from
A. Gypsum
B. Feldspar
C. Galena
D. Bauxite
Question 92
Which of the following is not an abrasive material ?
A. Bakelite
B. Pumice
C. Corundum
D. Carborundum
Question 93
Ethanol amine is produced using ammonia and
A. Ethyl benzene
B. Ethylene oxide
C. Ethanol
D. Ethane
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
Question 95
Sodium bisulphite is used for __________ water.
A. Deaeration
B. Dechlorination
C. Both A & B
D. Neither A nor B
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
Question 97
Chloral is used in the manufacture of
A. DDT
B. BHC
C. Parathion
D. None of these
Question 98
Mannheim furnace is used in the manufacture of
A. Hydrochloric acid
B. H₂SO₄ by Chamber process
C. Calcium carbide
D. Corundum
Question 99
Fourdrinier machine is used in the manufacture of
A. Nylon-6
B. Paper
C. Antibiotics
D. Sugar
Question 100
Yeast is used in the manufacture of
A. Pencillin
B. Antibiotics
C. Wine
D. Pasteurised milk
Question 101
Fourdrinier machine is used in the manufacture of
A. Sugar
B. Paper
C. Alcohol from molasses
D. Phenol formaldehyde
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
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
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
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
Question 106
__________ glass is used for the manufacture of optical glass.
A. Pyrex
B. Soda
C. Flint
D. Crooke's
Question 107
Caprolactum (a raw material for nylon-6 manufacture) is produced from
A. Phenol
B. Naphthalene
C. Benzene
D. Pyridine
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
Question 109
Bromine content in sea water may be around __________ ppm.
A. 70
B. 640
C. 1875
D. 2500
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
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
Question 112
Catalytic oxidation of toluene produces
A. Styrene
B. Phenol
C. Benzene
D. Tri-nitro-toluene
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
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
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
Question 116
Liquor poisoning generally occurs due to the presence of __________ in it.
A. Ethyl alcohol
B. Impurities
C. Methyl alcohol
D. Carbonic acid
Question 117
Sulphur removal by heating of pyrite ore in presence of air is called its
A. Reduction
B. Roasting
C. Calcination
D. Smelting
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
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
Question 120
Fusion of bauxite and __________ produces high alumina cement.
A. Alum
B. Limestone
C. Coke
D. Quartz
Question 121
Fusion of limestone and __________ produces high alumina cement.
A. Sand
B. Bauxite
C. Quicklime
D. Calcite
Question 122
Which of the following, when pyrolysed, produces perchloro-ethylene?
A. Ethylene dichloride
B. Chlorobenzene
C. Carbon tetrachloride
D. Chlorinated paraffin
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
Question 124
Hydrophilic group of a soap or detergent solution is
A. Water hating
B. Soil loving
C. Water loving
D. None of these
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
Question 126
High temperature carbonisation of coal takes place at __________ °C.
A. 2000
B. 700
C. 1100
D. < 500
Question 127
Low temperature carbonisation of coal takes place at __________ °C.
A. 300
B. 1100
C. 700
D. 900
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
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
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
Question 131
Which of the following coals has the highest calorific value?
A. Lignite
B. Sub-bituminous
C. Anthracite
D. Peat
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
Question 133
Baking soda is chemically represented by
A. Na₂CO₃
B. NaHCO₃
C. Na₂CO₃.H₂O
D. Na₂CO₃.10H₂O
Question 134
Washing soda is chemically represented by
A. Na₂CO₃
B. Na₂CO₃.H₂O
C. Na₂CO₃.10H₂O
D. NaHCO₃
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%
Question 136
The basic difference between vegetable oils and fats is in their
A. Density
B. Chemical properties
C. Physical state
D. Composition
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
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
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
Question 140
Main constituent of dolomite is
A. CaCO₃
B. MgCO₃
C. K₂CO₃
D. Na₂CO₃
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
Question 142
Bleaching action of bleaching powder is due to its __________ properties.
A. Reducing
B. Oxidising
C. Disinfecting
D. None of these
Question 143
Bakelite is chemically known as
A. Polyvinyl chloride (PVC)
B. Polybutadiene
C. Phenol formaldehyde
D. Polyurathane
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
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
Question 146
__________ nature of hypo (sodium thiosulphate) makes it useful in photography.
A. Oxidising
B. Reducing
C. Complex forming
D. Photochemical
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
Question 148
Phenol formaldehyde resin is used as an adhesive in making
A. Laminates
B. Card boxes
C. Furniture
D. Books
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
Question 150
Solvent used for extraction of oil is
A. Hexane
B. Methyl ethyl ketone
C. Furfurol
D. None of these
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
Question 152
Chemical name of Grignard reagent is
A. Sodium thiosulphate
B. Ethyl magnesium chloride
C. Sodium sulphite
D. Sodium bicarbonate
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
Question 154
In industrial nomenclature, alcohol means
A. Butyl alcohol
B. Propyl alcohol
C. Ethanol
D. Methyl alcohol
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
Question 156
Calgon used in water treatment is chemically
A. Sodium phosphate
B. Sodium hexametaphosphate
C. Calcium phosphate
D. Tricresyl phosphate
Question 157
Addition of calcium oxide to water produces
A. Exothermic heat
B. Hissing sound
C. Slaked lime
D. All of the above
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
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
Question 160
Type of glass used in optical work is the __________ glass.
A. Soda-lime
B. Fibre
C. Lead
D. Borosilicate
Question 161
The most economical pulp for the production of newsprint would be the __________ pulp.
A. Groundwood
B. Sulphate
C. Sulphite
D. Semichemical
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
Question 163
Reaction of an alcohol with organic acid is called the __________ reaction.
A. Saponification
B. Esterification
C. Neutralisation
D. Acidification
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
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
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
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
Question 168
The gasification reaction represented by, C + H₂O = CO + H₂, is a/an __________ reaction.
A. Exothermic
B. Endothermic
C. Catalytic
D. Autocatalytic
Question 169
Which of the following is an organo-metal-lic compound?
A. Isopropyl alcohol
B. Tetra-ethyl lead
C. Zeolite
D. Cumene
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
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
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
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
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
Question 175
Poly Vinyl Chloride (P.V.C.) is a __________ material.
A. Thermosetting
B. Thermoplastic
C. Fibrous
D. Chemically active
Question 176
Titanium dioxide is a/an __________ colour pigment.
A. White
B. Black
C. Yellow
D. Blue
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
Question 178
__________ is a thermosetting plastic.
A. Polyvinyl chloride
B. Polythene
C. Bakelite
D. Teflon
Question 179
__________ is a thermosetting plastic.
A. Polythene
B. Epoxy polymer
C. P.V.C.
D. Polystyrene
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
Question 181
Commercial production of Vanaspati is done by __________ of edible vegetable oils.
A. Hydrogenation
B. Oxidation
C. Hydrolysis
D. Hydrocracking
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
Question 183
__________ paper is used in the manufacture of newsprint paper.
A. Groundwood
B. Board
C. Tissue
D. Wrapping
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
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
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
Question 187
Polythene is a/an __________ polymerisation product.
A. Addition
B. Condensation
C. Thermosetting
D. None of these
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
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
Question 190
Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials.
A. Adsorbs
B. Oxidises
C. Reduces
D. Converts
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
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
Question 193
Pencillin is made employing __________ fermentation process.
A. Continuous
B. Aerobic batch
C. Anaerobic batch
D. None of these
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
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
Question 196
More than 100 percent of __________ is present in oleum.
A. SO₃
B. H₂SO₄
C. H₂SO₃
D. SO₂
Question 197
Calcareous & argillaceous materials are used in the manufacture of
A. Lead
B. Cement
C. Carbon disulphide
D. None of these
Question 198
Fire clay is __________ refractory material.
A. A basic
B. An acidic
C. A neutral
D. Not a
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
Question 200
Chemical name of aspirin (an analgesic drug) is
A. Acetylsalicylic acid
B. Nictonic acid
C. Calcium acetate
D. Methyl salicylate
Question 201
Metallic soap is __________ salt of fatty acids.
A. Sodium
B. Potassium
C. Both sodium & potassium
D. Aluminium or calcium
Question 202
__________ is a polysacchride.
A. Maltose
B. Starch
C. Sucrose
D. Glucose
Question 203
Fermentator temperature during production of alcohol from molasses is around __________ °C.
A. 5
B. 30
C. 150
D. 300
Question 204
__________ is an ore of lead.
A. Quartz
B. Galena
C. Siderite
D. Chalcopyrite
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
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
Question 207
10% oleum comprises of 10% free
A. SO₂
B. H₂SO₃
C. SO₃
D. H₂SO₄
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
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
Question 210
Phosphate rock is a raw material for the manufacture of
A. Phosphoric acid
B. Phosphorous
C. Superphosphates
D. All of the above
Question 211
Carbon tetrachloride (CCl₄) is the starting raw material for the manufacture of
A. Trichloroethylene
B. Perchloroethylene
C. Parathion
D. Methanol
Question 212
Salt is the basic raw material for the manufacture of
A. Cement
B. Glass
C. Potteries
D. Caustic soda
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
Question 214
Fatty material used in soap making is
A. Fatty acid
B. Fatty alcohols
C. Tallow
D. Detergents
Question 215
Glycerine is a by-product of the __________ industry.
A. Soap
B. Detergent
C. Oil hydrogenation
D. Paint
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
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
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
Question 219
Rancidity of the fatty oil can be reduced by its
A. Decoloration
B. Hydrogenation
C. Oxidation
D. Purification
Question 220
The main product of high temperature carbonisation of coal is
A. Coke
B. Ammonia
C. Tar
D. Phenol
Question 221
Bakelite is
A. Same as poly tetrafluoroethylene (PTFE)
B. An inorganic polymer
C. Same as thermosetting phenol-formaldehyde
D. Not a polymer
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
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
Question 224
The temperature in the calcium carbide furnace is __________ °C.
A. 200-300
B. 700-850
C. 2000-2200
D. 4000-4500
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
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
Question 227
Which is the most suitable dye for synthetic fibres?
A. Acid dye
B. Azoic dye
C. Pigment dye
D. Mordant dye
Question 228
Blue vitriol is chemically
A. Copper sulphate
B. Ferrous sulphate
C. Copper nitrate
D. Aluminium sulphate
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
Question 230
Bordeaux mixture is a/an
A. Fertiliser
B. Inorganic fungicide
C. Insecticide
D. Explosive
Question 231
The noble gas which occurs most abundantly in the atmosphere is
A. Helium
B. Neon
C. Krypton
D. Argon
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
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
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
Question 235
Sand and __________ is fused at 1300°C, to produce sodium silicate.
A. Limestone
B. Soda ash
C. Coke
D. Sodium sulphate
Question 236
Ca(OH)₂ is called
A. Quicklime
B. Slaked lime
C. Limestone
D. Gypsum
Question 237
Calcination of gypsum produces
A. Plaster of paris
B. Salt cake
C. Nitre cake
D. Lime
Question 238
CaO is called
A. Quick lime
B. Slaked lime
C. Limestone
D. Calcite
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
Question 240
Carborundum consists mainly of
A. Bauxite
B. Silicon carbide
C. Boron carbide
D. Calcium carbide
Question 241
CaSO₄ .1/2 H₂O is known as
A. Blue vitriol
B. Plaster of Paris
C. Gypsum
D. Zeolite
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
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
Question 244
Hydrogenation of oil takes place in a/an __________ reactor.
A. Autothermal
B. Trickle bed
C. Plug flow
D. None of these
Question 245
Celluloid is chemically
A. Cellulose acetate
B. Regenerated cellulose
C. Cellulose nitrate
D. Cellulose acetate butyrate
Question 246
Cement mainly contains
A. CaO, SiO₂, Al2O₃
B. MgO, SiO₂, K₂O
C. Al2O₃, MgO, FE₂O₃
D. CaO, MgO, K₂O
Question 247
Chemical formula of oleum is
A. H₂SO₃
B. H₂SO₄
C. H₂S₂O₇
D. H₂SO₇
Question 248
Chemical name of 'alum' is
A. Barium sulphate
B. Aluminium sulphate
C. Aluminium chloride
D. Calcium sulphate
Question 249
Chemical name of soda ash is
A. Sodium bicarbonate
B. Sodium thiosulphate
C. Potassium carbonate
D. None of these
Question 250
Main product in calcium carbide-water reaction is
A. Ca(OH)₂
B. C₂H₂
C. CO₂
D. CaCO₃
Question 251
CaCl(OCl) is the chemical formula of
A. Hypo
B. Bleaching powder
C. Plaster of paris
D. Aqua regia
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
Question 253
Which of the following is used as a coagulant in water treatment?
A. Chloramine
B. Chlorine
C. Ferrous sulphate
D. Hydrogen peroxide
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
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
Question 256
Raw material used in alcohol distilleries in India is
A. Molasses
B. Benzol
C. Methylated spirit
D. None of these
Question 257
Fermentation of molasses to produce ethyl alcohol is done at __________ °C
A. 20 - 30
B. < - 5
C. 100 - 150
D. 250 - 300
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
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
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
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
Question 262
Catalyst used during the manufacture of 'Vanaspati Ghee' is
A. Zinc
B. Nickel
C. Platinum
D. Copper
Question 263
Fat splitting catalyst is
A. CaCO₃
B. ZnO
C. Al2O₃
D. Fe
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
Question 265
Vegetable oils and fats basically differ in their
A. Density ranges
B. Physical state
C. Chemical composition
D. Chemical properties
Question 266
Which oil is preferred for paint manufacture?
A. Drying oil
B. Non-drying oil
C. Semi-drying oil
D. Saturated oil
Question 267
Which of the following is not a pyrite ore?
A. Celestite
B. Galena
C. Gypsum
D. Siderite
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
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
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
Question 271
Which of the following is a constituent of coffee?
A. Caffeine
B. Nicotine
C. Calgon
D. Lignin
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
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
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
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
Question 276
Glass is
A. Mainly CaO
B. Subjected to galvanising
C. A super cooled liquid
D. All of the above
Question 277
Glauber's salt is chemically
A. Calcium sulphate
B. Potassium sulphate
C. Potassium chlorate
D. None of these
Question 278
Glycerine can be obtained from
A. Fat
B. Naphthalene
C. Cumene
D. Sucrose
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
Question 280
Graphite is a/an
A. Electrical insulator
B. Allotrope of carbon
C. Moderator used in nuclear reactor
D. Both B and C
Question 281
Gun powder uses
A. Sulphur
B. Charcoal
C. Potassium nitrate
D. All of the above
Question 282
Gypsum is chemically
A. Calcium chloride
B. Potassium sulphate
C. Sodium sulphate
D. Calcium sulphate
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
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
Question 285
Chalcopyrite is the main ore of
A. Copper
B. Lead
C. Tin
D. Iron
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
Question 287
Iron ore hametite is concentrated using
A. Electro magnetic separation mainly
B. Gravity separation
C. Froth floatation
D. Roasting
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
Question 289
Chemical formula of BHC, which is an insecticide is
A. C₆H₆Cl₆
B. C₆Cl₆
C. C₆H₅Cl
D. C₆H₄Cl₂
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
Question 291
Which of the following is an explosive?
A. Nitroglycerene
B. Trintrotoluene (TNT)
C. Cellulose nitrate
D. All of the above
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
Question 293
Industrial production of chloroform requires acetone and
A. Phosgene
B. Calcium hypochlorite
C. Chlorine
D. Ammonium chloride
Question 294
Yellow phosphorus is transported under
A. Air
B. Water
C. Nitrogen
D. Helium
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
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
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
Question 298
Hydrolysis of sugar is called
A. Hydration
B. Inversion
C. Esterification
D. None of these
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
Question 300
Pencillin, an antibiotic drug was discovered by
A. Alexender
B. Flaming
C. Dr. Zivago
D. None of these
Question 301
Chemical formula of 'salt cake' is
A. Na₂SO₄
B. CaSO₄
C. MgSO₄
D. BaSO₄
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
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
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
Question 305
Which catalyst is used in the manufacture of ethylene oxide by oxidation of ethylene?
A. AgO
B. Al2O₃
C. ZnCl₂
D. FE₂O₃
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
Question 307
Stereospecific agents are exemplified by
A. Radiation
B. Supported metal oxide catalysts
C. Ziegler catalysts
D. All of the above
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
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
Question 310
Essential oils are usually obtained using
A. Steam distillation
B. Extractive distillation
C. Solvent extraction
D. Leaching
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
Question 312
The main component of pyrex glass is
A. Zinc
B. Lead
C. Boron
D. Celenium
Question 313
Main constituent of limestone is
A. CaCO₃
B. MgCO₃
C. Na₂CO₃
D. CaSO₄
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
Question 315
Catalyst used in the hydrogenation of oil is
A. Nickel
B. Platinum
C. Iron
D. Alumina
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
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
Question 318
Bleaching of paper pulp is done with
A. Activated clay
B. Bromine
C. Chlorine or chlorine dioxide
D. Magnesium sulphite
Question 319
__________ is produced using polycondensation reaction.
A. Polythene
B. Phenol formaldehyde
C. Poly vinyl chloride
D. None of these
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
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
Question 322
Carbon disulphide is mainly used in the production of
A. Viscose rayon
B. Corundum
C. Plasticiser for unsaturated polyester
D. Paints
Question 323
Insulin is an __________ drug.
A. Anti-malarial
B. Anti-TB
C. Antibiotic
D. None of these
Question 324
Inversion of sucrose produces
A. Fructose
B. Glucose
C. Both A & B
D. Neither A nor B
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
Question 326
Catalytic oxidation-dehydrogenation of methyl alcohol produces
A. Formaldehyde
B. Phenol
C. Acetone
D. Maleic anhydride
Question 327
The combustion reaction, C + O₂ = CO₂, is
A. Exothermic
B. Endothermic
C. Autocatalytic
D. None of these
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
Question 329
Sodium chloride content in sea water is about __________ gms/litre.
A. 2
B. 10
C. 25
D. 50
Question 330
Basic oxide is absent in __________ glass.
A. Flint
B. Pyrex
C. Quartz
D. All of the above
Question 331
Which of the following is an unsaturated fatty acid?
A. Lauric acid
B. Palmitic acid
C. Stearic acid
D. Oleic acid
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
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
Question 334
The most stable allotropic form of phosphorous is the __________ phosphorous.
A. White
B. Black
C. Yellow
D. Red
Question 335
Coagulant is used __________ filtration.
A. Before
B. After
C. During
D. To avoid
Question 336
Deacon's method is used for the manufacture of
A. Glauber's salt
B. Common salt
C. Chlorine
D. Graphite electrode
Question 337
Solvay process is used for the manufacture of
A. Caustic soda
B. Soda ash
C. Caustic potash
D. Soda lime
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
Question 339
Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.
A. Cutting
B. Fibrillation
C. Hydration
D. Strengthening
Question 340
Sulphuric acid completely saturated with sulphur trioxide is called
A. Concentrated sulphuric acid
B. Oleum
C. Sulphurous acid
D. Dilute sulphuric acid
Question 341
__________ is the major constituent of the Portland cement.
A. Calcium carbonate
B. Calcium oxide
C. Tricalcium silicate
D. Calcium sulphate
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
Question 343
Kaoline is a/an
A. Refractory material
B. Synthetic resin
C. Artificial abrasive
D. Blue pigment
Question 344
Coke oven gas consists mainly of
A. H₂, & CH₄
B. CO, & CO₂
C. H₂, & CO
D. CH₄, & CO
Question 345
Commonly used glass is known as the __________ glass.
A. Flint
B. Hard
C. Pyrex
D. Soda
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
Question 347
The amount of benzene present in pure benzol is about __________ percent.
A. 30
B. 50
C. 70
D. 90
Question 348
Concentration of NaOH solution produced by diaphragm electrolytic cell is about __________ percent.
A. 10
B. 25
C. 50
D. 98
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
Question 350
An oil is converted into fat by its
A. Hydrogenation
B. Hydrolysis
C. Hydrocracking
D. Hydration
Question 351
Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces
A. Nylon-6
B. Dacron
C. Polyester
D. PVC
Question 352
Portland cement consists mainly of
A. CaO & SiO₂
B. SiO₂ & Al2O₃
C. CaO & Al2O₃
D. CaO & FE₂O₃
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
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
Question 355
Electrodeposition of metals i.e. electroplating is never done on
A. Metals
B. Alloys
C. Refractories
D. Non-metals
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
Question 357
P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as
A. Bakelite
B. Neoprene
C. Teflon
D. Nylon-66
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
Question 359
Litharge is
A. Lead oxide
B. Zinc oxide
C. Zinc sulphide
D. Cellulosic photographic material
Question 360
Lithopaneis
A. Explosive
B. White lead
C. Filter aid
D. ZnS (white pigment)
Question 361
Which of the following is an yellow pigment?
A. Titanium dioxide
B. Ferrous sulphate
C. Lead chromates
D. Zinc sulphides
Question 362
Which of the following is not an antibiotic?
A. Penicillin
B. Streptomycin
C. Tetracyclin
D. Quinine
Question 363
Which of the following is not an insecticide?
A. Hydrocyanic acid
B. Nicotine
C. Sodium flouride
D. Hexane
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
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
Question 366
Which of the following is not a food additive?
A. Citric acid
B. Invertage
C. Benzoyl peroxide
D. Ammonium chloride
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
Question 368
Concentration of sulphide ores is done usually by
A. Roasting
B. Smelting
C. Froth floatation
D. Electro magnetic separation
Question 369
Finely ground calcium aluminate & silicate is a/an
A. Cermet
B. Cement
C. Abrasive
D. Explosive
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
Question 371
Main use of hydrazine is
A. As a rocket fuel
B. In water treatment
C. As a disinfectant
D. As fire retardant
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
Question 373
Margarine is a/an
A. Fat
B. Explosive
C. Plasticiser
D. Rocket propellant
Question 374
Massecuite is
A. Used for paper making
B. Used as a cattle feed
C. Highly acidic in nature
D. None of these
Question 375
Cumene is the starting material for the production of
A. Benzoic acid
B. Phenol and acetone
C. Isoprene
D. Styrene
Question 376
Molasses is the starting material for the production of
A. Alcohol
B. Essential oil
C. Fatty acids
D. Massecuite
Question 377
Flexible foam (for mattresses) is usually made of
A. PVC
B. Silicone
C. Polyurethanes
D. Polyamides
Question 378
Main constituents of portland cement are calcium aluminate and
A. Gypsum
B. Silicates
C. Sodium silicate
D. Carbonates
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
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
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
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
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)
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
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
Question 386
Fermentation is adversely affected by the
A. Presence of air
B. Absence of air
C. High concentration
D. Presence of ammonium salts
Question 387
Nitrogen is an essential component of
A. Mineral salts
B. Carbohydrates
C. Fats
D. Proteins
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
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
Question 390
Main use of liquid nitrogen is in
A. Rocket propulsion
B. Making gun powder
C. Detergent manufacture
D. Refrigerative cooling
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
Question 392
Na₂CO₃ is called
A. Washing soda
B. Soda ash
C. Plaster of paris
D. Calcite
Question 393
Na₂CO₃.10H₂O is called
A. Washing soda
B. Soda ash
C. Slaked lime
D. Quicklime
Question 394
Naphthols are derivates of
A. Methyl amine
B. Naphthalene
C. Phenol
D. Xylene
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
Question 396
Dehydrogenation of isopropanol produces
A. Propyl alcohol
B. Acetone
C. Trichloroethylene
D. Formaldehyde
Question 397
Which of the following is the second major component of cement?
A. Al₂O₃
B. SiO₂
C. CaO
D. Fe₂O₃
Question 398
The manufacture of Kraft pulp is done by a/an __________ process.
A. Alkaline
B. Acidic
C. Neutral
D. None of these
Question 399
Commercially ethylene is produced from naphtha by
A. Catalytic cracking
B. Catalytic dehydrogenation
C. Pyrolysis
D. Hydrocracking
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
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
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
Question 403
H₂S is scrubbed from refinery gases by absorption using
A. Dilute H₂SO₄
B. Ethanol amine
C. Chilled water
D. Tri-butyl phosphate
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
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
Question 406
The major constituent of black liquor generated during paper manufacture is sodium
A. Sulphate
B. Carbonate
C. Hydroxide
D. Bi-carbonate
Question 407
Boiling of water containing temporary hardness produces
A. CO₂
B. CaSO₄
C. CaHCO₃
D. None of these
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
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
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
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
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
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
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
Question 415
Sodium carbonate (soda ash) is not used in the manufacture of
A. Fire extinguishers
B. Sugar
C. Baking powder
D. Detergents
Question 416
Nitric acid is not used in the manufacture of
A. Detergents
B. Fertilisers
C. Aqua regia
D. Explosives
Question 417
The basic constituent of vegetable oils is
A. Triglyceride
B. Fatty acids
C. Fatty alcohol
D. Mono esters
Question 418
Cellulose percentage in bamboo fibre is about
A. 10
B. 20
C. 50
D. 85
Question 419
In premitive days, __________ was being manufactured by Leblanc Process.
A. Alum
B. Washing soda
C. Soda ash
D. Calcium carbide
Question 420
Removal of dirt/soil by soaps or detergent does not involve the __________ of soil.
A. Emulsification
B. Dispersion
C. Precipitation
D. Wetting
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
Question 422
CO & H₂ are the constituents of
A. Producer gas
B. Water gas
C. Coke oven gas
D. All of the above
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
Question 424
Hydrochloric acid is also known as
A. Oil of vitriol
B. Muriatic acid
C. Strong organic acid
D. Green acid
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
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
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
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
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
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
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
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
Question 433
Oleum produces fumes of
A. SO₂
B. H₂SO₄
C. SO₃
D. SO₂ + H₂SO₄
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
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
Question 436
Builders are added in soap to act as
A. Cleaning power booster
B. Anti-redeposition agent
C. Corrosion inhibitor
D. Fabric brightener
Question 437
__________ is used as a catalyst in fat splitting.
A. ZnO
B. Ni
C. V₂O₅
D. FeO
Question 438
Which one of the following is not an elastomer?
A. Polyisoperene
B. Neoprene
C. Nitrile-butadiene
D. None of these
Question 439
Sucrose is a disaccharide consisting of
A. Glucose and glucose
B. Glucose and fructose
C. Glucose and galactose
D. Fructose and galactose
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
Question 441
__________ is an ore concentrating metallurgical process involving a chemical change.
A. Electromagnetic separation
B. Froth floatation
C. Roasting
D. None of these
Question 442
Hydrodenation of vegetable oils is a/an __________ reaction.
A. Endothermic
B. Autocatalytic
C. Exothermic
D. Homogenous
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
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
Question 445
Average sulphur content in Indian pyrites is about __________ percent.
A. 15
B. 35
C. 55
D. 70
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
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
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
Question 449
__________ iron is the purest form of iron.
A. Cast
B. Wrought
C. Pig
D. High silicon
Question 450
Phthalic anhydride is produced by the oxidation of
A. Naphthalene
B. Benzene
C. Toluene
D. Aniline
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
Question 452
__________ process is used for producing soda ash.
A. Chamber
B. Chance
C. Tromp
D. Solvay
Question 453
Fat dispersed in water is exemplified by
A. Colloids
B. Gel
C. Butter
D. Emulsion
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
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
Question 456
Silicon carbide is a/an
A. Adhesive
B. Abrasive
C. Type of glass
D. Brittle material
Question 457
Silicone is a/an
A. Thermoplastic
B. Inorganic polymer
C. Monomer
D. None of these
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
Question 459
__________ acid is the main constituent of cotton seed oil.
A. Acetic
B. Linoleic
C. Palmitic
D. Oleic
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
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
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
Question 463
Soaps remove dirt by
A. Increasing the surface tension
B. Decreasing wettability
C. Supplying hydrophyllic group
D. None of these
Question 464
Main constituents of cotton fiber is
A. Lignin
B. Cellulose
C. Starch
D. Gelatine
Question 465
Which allotrope of sulphur is insoluble in carbon disulphide?
A. Rhombic sulphur
B. Monoclinic sulphur
C. Plastic sulphur
D. Milk of sulphur
Question 466
Solvent extracted oil
A. Has low free fatty acid content
B. Is odourless
C. Has more of unsaturates
D. None of these
Question 467
Major component of flint glass is
A. Lead oxide
B. Silica
C. Alumina
D. Soda
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
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
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
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
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
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
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
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
Question 476
Production of alcohol by fermentation of molasses is an __________ process.
A. Anaerobic
B. Aerobic
C. Endothermic
D. Both B and C
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
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
Question 479
Main constituents of natural rubber is
A. Polystyrene
B. Polyisoprene
C. Polybutadiene
D. Polychloroprene
Question 480
Absorption of SO₃ in 97% H₂SO₄ is
A. Exothermic
B. Endothermic
C. Not possible
D. None of these
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
Question 482
The most reactive allotropic form of phosphorus is __________ phosphorus.
A. Red
B. Yellow
C. Violet
D. Black
Question 483
Sucrose is a
A. Monosacchride
B. Disacchride
C. Polysacchride
D. None of these
Question 484
Phosphoric acid is prepared from
A. Cryolite
B. Chalcopyrite
C. Rock phosphate
D. None of these
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
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
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
Question 488
Sea water contains about __________ ppm of bromine.
A. 5
B. 70
C. 500
D. 1700
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
Question 490
__________ is not a constituent of gun powder.
A. Carbon
B. Charcoal
C. Sulphur
D. Potassium nitrate
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
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
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
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
Question 495
Parathion and Malathion are
A. Pesticides
B. Plasticisers for unsaturated polysters
C. Pain-relieving drugs (analgesic)
D. Tranquilisers
Question 496
Glauber's salt is chemically represented by
A. Na₂SO₄.10H₂O
B. CaCl(OCl)
C. CaSO₄.H₂O
D. (NH₄)₂SO₄
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
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
Question 499
An alkali metal salt of palmitic acid is known as
A. Soap
B. Metallic soap
C. Detergent
D. Alkaloid
Question 500
Which form of sulphur is the most stable at room temperature?
A. Plastic
B. Monoclinic
C. Rhombic
D. Flowers of sulphur
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
Question 502
Alcohol percentage in molasses may be around
A. 10
B. 40
C. 70
D. 85
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
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
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
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
Question 507
Teflon is
A. Phenol formaldehyde
B. An inorganic polymer
C. Poly tetrafluoroethylene (P.T.F.E.)
D. A monomer
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
Question 509
Drinking (potable) water treatment does not involve
A. Coagulation
B. Sedimentation
C. Softening
D. Disinfection
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
Question 511
Sodium salt of higher molecular weight fatty acid is termed as the __________ soap.
A. Hard
B. Soft
C. Metallic
D. Lubricating
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
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
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
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
Question 516
Cement setting under water employs a/an __________ process.
A. Hydration
B. Decomposition
C. Oxidation
D. Reduction
Question 517
Which of the following is a detergent?
A. Benzene hexachloride
B. Alkyl benzene sulphonate
C. Polytetraflouroethylene
D. Cellulose nitrate
Question 518
Which of the following is a detergent?
A. Fatty alcohol
B. Alkyl benzene sulphonate (ABS)
C. Fatty acids
D. Methylene chloride
Question 519
Extraction of __________ employs an electrolytic process.
A. Aluminium
B. Silver
C. Copper
D. All of the above
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
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
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
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
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
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
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
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
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
Question 529
A 'unit process' is exemplified by the
A. Distillation
B. Hydrogenation of oils
C. Absorption
D. Humidification
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
Question 531
Poly tetraflouro ethylene (P.T.F.E.) is known as
A. Bakelite
B. Teflon
C. Celluloid
D. Decron
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
Question 533
Conversion of SO₂ to SO₃ in Monsanto 4-pass converter is about __________ percent.
A. 80
B. 90
C. 98
D. 100
Question 534
Synthetic glycerine is produced from
A. Toluene
B. Phenol
C. Propylene
D. Naphthalene
Question 535
Dehydrogenation of ethyl benzene produces
A. Styrene
B. Naphthalene
C. Phenol
D. Benzoic acid
Question 536
L.D. converter is used in the production of
A. Pig iron
B. Steel
C. Copper
D. Zinc
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
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
Question 539
Catalyst used in the oxidation of benzene to produce maleic anhydride is
A. V₂O₅
B. Pt
C. Ni
D. Cr
Question 540
Setting of plaster of paris is accompanied with
A. Hydration
B. Dehydration
C. Hydrolysis
D. Loss of CO₂
Question 541
The enzyme which converts starch into the disacharides maltose is
A. Diastase
B. Maltase
C. Yeast
D. None of these
Question 542
Trinitro-toluene (TNT) is
A. Used in glycerine manufacture
B. An explosive
C. Used in dye manufacture
D. None of these
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
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
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
Question 546
Hydrazine is used in water treatment for the removal of
A. Colloidal impurities
B. Dissolved oxygen
C. Turbidity
D. Chlorinous taste
Question 547
Maleic anhydride is produced by catalytic oxidation of
A. Toluene
B. Ethyl alcohol
C. Naphthalene
D. Benzene
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
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
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
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
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
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
Question 554
Grignard reagent is chemically known as
A. Ethyl magnesium chloride
B. Methyl magnesium chloride
C. Dichlorophenol
D. Monochloro acetic acid
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
Question 556
__________ of quicklime produces slaked lime.
A. Hydration
B. Dehydration
C. Hydrogenation
D. None of these
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
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
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
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
Question 561
Potassium is kept & transported under
A. Water
B. Liquid ammonia
C. Kerosene oil
D. Alcohol
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
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
Question 564
Riboflavin is a/an
A. Vitamin
B. Analgesic drug
C. Anaesthetics
D. Anti-malarial drug
Question 565
Yellow glycerine is made into white, using
A. Activated carbon
B. Diatomaceous earth
C. Bauxite
D. Bentonite
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
Question 567
Gun powder, which is an explosive comprises of charcoal, sulphur and
A. Glycerene
B. Salt petre
C. Nitro glycerene
D. Dynamite
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
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
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
Question 571
Producer gas consists mainly of
A. CO, CO₂ N₂, H₂
B. CO, H₂
C. H₂, CH₄
D. C₂H₂, CO₂, H₂
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
Question 573
Commercial production of calcium carbide requires limestone and __________ as raw materials.
A. Coke
B. Sand
C. Soda ash
D. Fuel oil
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
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
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
Question 577
Enzymes are organic catalysts used in the __________ reactions.
A. Chemical
B. Biochemical
C. Photochemical
D. Electrochemical
Question 578
The catalyst used in the manufacture of DDT is
A. Alumina
B. Silica
C. 20% oleum
D. Aluminium chloride
Question 579
Sulphuric acid saturated with SO₃ is called
A. Concentrated H₂SO₄
B. Sulphurous acid
C. Oleum
D. None of these
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
Question 581
Nylon-6 as compared to Nylon-66 is having higher
A. Hardness
B. Abrasion/resistance
C. Melting point
D. None of these
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
Question 583
Dacron is a/an
A. Polyester
B. Unsaturated polyster
C. Polyamide
D. Inorganic polymer
Question 584
Catalytic oxidation of naphthalene produces
A. Styrene
B. Phenol
C. Phthalic anhydride
D. None of these
Question 585
DDT stands for
A. Diethyl-diphenyl-trichloromethane
B. Dichloro-diphenyl-trichloromethane
C. Diphenyl-dichloro-trichloromethane
D. Dichloro-diphenyl-trichloroethane
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
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
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
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
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
Question 591
Helium is produced on commercial scale from
A. Air
B. Natural gas
C. Coke oven gas
D. None of these
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
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
Question 594
Separation of fresh water from sea water can be done by the __________ operation.
A. Osmosis
B. Reverse osmosis
C. Absorption
D. Adsorption
Question 595
Bisphenol A is produced by the condensation of acetone with
A. Formaldehyde
B. Ethyl alcohol
C. Diethyl ether
D. Phenol
Question 596
Which of the following is a disacchride?
A. Sucrose
B. Glucose
C. Starch
D. Maltose
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
Question 598
Salt cake is chemically represented by
A. Na₂SO₄
B. CaSO₄.1/2 H₂O
C. MgSO₄
D. BaSO₄
Question 599
Prussian blue is chemically represented by
A. FeO.TiO₂
B. Ca SO₄ . 2H₂O
C. Fe₄ [Fe (CN₆)₃]
D. AlF₃ . 3NaF
Question 600
Flash point of most vegetable oils is about __________ °C.
A. 50
B. 100
C. 200
D. 300
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
Question 602
Magnesium and calcium __________ cause temporary hardness of water.
A. Carbonates
B. Bicarbonates
C. Phosphates
D. Sulphates
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
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
Question 605
Trinitrotoluene (TNT), an explosive, is made by the nitration of
A. Nitrobenzene
B. Toluene
C. Nitrotoluene
D. Benzene
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
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
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
Question 609
Sulphuric acid is mainly used in the __________ industry.
A. Fertiliser
B. Steel
C. Paper
D. Paint
Question 610
Massacuits is a terminology used in the __________ industry.
A. Paint
B. Oil hydrogenation
C. Soap
D. Sugar
Question 611
Most commonly used rubber vulcanising agent is
A. Sulphur
B. Bromine
C. Platinum
D. Alumina
Question 612
Blue colour is imparted to glass by the addition of
A. FeSO₄
B. PbO
C. CaO
D. NaOH
Question 613
Oils and fats are converted to soap in a process called
A. Hydrogenation
B. Esterification
C. Saponification
D. None of these
Question 614
Sea weeds are an important source of
A. Fluorine
B. Chlorine
C. Bromine
D. Iodine
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
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
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
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
Question 619
The most widely used coagulant for removing suspended impurities from water is
A. Bleaching powder
B. Chlorine
C. Calcium sulphate
D. Alum
Question 620
Isopropyl benzene produced by alkylation of benzene with propylene is known as
A. Neoprene
B. Cumene
C. Gelatin
D. Mercaptans
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
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
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
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
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
Question 626
Neoprene is chemically known as
A. Polybutadiene
B. Styrene butadiene rubber (SBR)
C. Polyurathane
D. Polychloroprene
Question 627
Epoxy resin
A. Is a good adhesive
B. Is an elastomer
C. Cannot be used for surface coatings
D. Is a polyester
Question 628
Anion exchanger is regenerated usually with
A. NaOH
B. H₂SO₄
C. Hydrazine
D. Alum solution
Question 629
Cation exchanger is regenerated usually with
A. NaOH
B. H₂SO₄
C. Hydrazine
D. Alum solution
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
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
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
Question 633
__________ are added in lacquers to remove film brittleness and to improve adhereness.
A. Film forming materials
B. Plasticisers
C. Diluents
D. Solvents
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
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
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
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
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
Question 639
The process used for the manufacture of ethyl alcohol from molasses is
A. Distillation
B. Dehydration
C. Dehydrogenation
D. None of these
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
Question 641
Thermal pyrolysis of ethylene dichloride produces
A. Trichloroethylene
B. Vinyl chloride
C. Ethanol amine
D. Ethylene oxide
Question 642
Concentration of hydrogen peroxide is done by
A. Crystallisation
B. Vacuum crystallisation
C. Atmospheric distillation
D. Dehydration
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
Question 644
Molecular weights of polymers are in the range of
A. 10² - 10²
B. 10⁵ - 10⁹
C. 10² - 10⁷
D. 10⁹ - 10¹¹
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
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
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