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Fertiliser Technology MCQ Questions & Answers

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




Question 1

Nitrogen content in ammonium sulphate (a fertiliser) is around __________ percent.

A. 5
B. 20
C. 50
D. 65

View Answer

Question 2

H₄P₂O₇ is the chemical formula of __________ phosphoric acid.

A. Pyro
B. Ortho
C. Meta
D. None of these

View Answer

Question 3

Catalyst used in the manufacture of NH₃ by Haber's process is finely divided

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

View Answer

Question 4

Tricresyl phosphate is chemically represented as

A. (CH₃ C₆ H₄)₃ PO₄
B. Ca₁₀(PO₄)3F₆
C. (NH₄)₂HPO₄
D. NH₄H₂PO₄

View Answer

Question 5

Electric furnace method for production of phosphorous uses phosphate rock

A. And phosphoric acid
B. And coke
C. And sulphuric acid
D. Silica and coke

View Answer

Question 6

Catalyst used in ammonia synthesis uses __________ as a promoter.

A. Pt
B. K₂O
C. Al2O₃
D. Ni

View Answer

Question 7

C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about

A. 2
B. 6
C. 13
D. 20

View Answer

Question 8

P₂O₅ content in triple superphosphate is about __________ percent.

A. 42-50
B. 15-20
C. 85-90
D. 70-75

View Answer

Question 9

Which of the following is the costliest method for commercial production of hydrogen for ammonia synthesis?

A. H? separation from coke oven gas
B. Steam reforming of naphtha
C. Cracking of natural gas
D. Electrolysis of water

View Answer

Question 10

Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N₂ & H₂ is high. The presence of promoter along with the catalyst helps in __________ of the catalyst.

A. Stabilisation
B. Increasing the effectiveness
C. Improving the strength & heat resistance
D. All of the above

View Answer

Question 11

The most suitable fertiliser for accelerating seeding or fruit formation in later stages of plant growth is __________ fertiliser.

A. Nitrogenous
B. Phosphatic
C. Potassic
D. None of these

View Answer

Question 12

Naphtha in a fertiliser plant is used as a source of

A. Fuel
B. H₂
C. N₂
D. O₂

View Answer

Question 13

Which of the following is a natural inorganic fertiliser?

A. Chile salt petre
B. Oilcake
C. Gobar mannure
D. None of these

View Answer

Question 14

Triple superphosphate is chemically represented as

A. CaF₂.3Ca₃(PO₄)₂
B. 3Ca₃(PO₄)₂
C. Ca(PO₃)₂
D. Ca(H₂PO₄)₂

View Answer

Question 15

Which of the following fertilisers is required for the development of fibrous materials of the plants and of the sugar of vegetable & fruits?

A. Nitrogenous fertilisers
B. Phosphatic fertilisers
C. Potassic fertiliser
D. None of these

View Answer

Question 16

Raw materials for nitric acid manufacture are

A. Hydrogen peroxide, air and water
B. Anhydrous ammonia and air
C. Anhydrous ammonia, air and water
D. Wet ammonia, air and water

View Answer

Question 17

Ammonium nitrate (a fertiliser) is coated with limestone powder to

A. Increase its nitrogen content
B. Cut down its production cost
C. Avoid the risk of explosion
D. Add extra nutrient as fertiliser

View Answer

Question 18

Which is the best fertiliser for paddy?

A. Ammonium sulphate
B. Nitro-phosphate
C. Superphosphate
D. Potassium nitrate

View Answer

Question 19

Pick out the wrong statement.

A. All the nitrogenous fertilisers are not soluble in water
B. A straight fertiliser contains only one nutrient
C. Calcium cynamide is used as weed killer in onion fields
D. The phosphorous nutrient makes the plant stem stronger and increases its branches

View Answer

Question 20

Monte catini process is used for the manufacture of

A. Nitric acid
B. Phosphoric acid
C. Urea
D. Calcium ammonium nitrate (CAN)

View Answer

Question 21

Hydrogen is recovered from coke oven gas on commercial scale (as practised in fertiliser plant at Rourkela) by

A. Adsorption on palladium
B. Cryogenic operations (low temperature cooling)
C. Absorption (using ethanolamine or pyragalloll solution)
D. None of these

View Answer

Question 22

Base suspension fertiliser essentially contains

A. 13% N2 and 43% P2O5
B. 43% N2 and 13% P2O5
C. 43% N2 and 13% K2O
D. 43% K2O and 43% P2O5

View Answer

Question 23

Catalyst used in the manufacture of NH3 by Haber's process is finely divided

A. nickel
B. iron
C. vanadium pentoxide
D. alumina

View Answer

Question 24

Oxidation of ammonia is

A. Exothermic
B. Endothermic
C. Non-catalytic
D. Autocatalytic

View Answer

Question 25

Which of the following does not come under the category of 'micro-nutrient' for plant growth?

A. Chlorine
B. Iron
C. Boron
D. Carbon

View Answer

Question 26

pH value of soil is maintained at __________ by the addition of fertiliser for optimum growth and health of the plant.

A. 4-5
B. 7-8
C. 9-10
D. 12-13

View Answer

Question 27

Reaction of orthophosphoric acid with soda ash produces

A. sodium tripolyphosphate (STPP)
B. tricresyl phosphate
C. tributyl phosphate
D. nitrophosphate

View Answer

Question 28

In the manufacture of orthophosphoric acid by strong H₂SO₄ leaching wet process, keeping the reactor temperature above 100°C, results in the formation of undesriable

A. CaSO₄ .½H₂O and CaSO₄ crystals
B. Pyrophosphoric acid
C. Metaphosphoric acid
D. All of the above

View Answer

Question 29

Ammonia synthesis gas is produced from natural gas by

A. thermal cracking
B. steam reforming
C. partial oxidation
D. hydrogenation

View Answer

Question 30

The composition of fresh feed to the high temperature, high pressure urea autoclave is

A. Excess liquid ammonia and liquefied CO₂
B. Excess liquid ammonia and compressed CO₂ gas
C. Liquid ammonia and excess compressed CO₂
D. Compressed ammonia gas and excess compressed CO₂

View Answer

Question 31

The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about __________ percent.

A. 60
B. 30
C. 95
D. 100

View Answer

Question 32

With increases in pressure, the conversion of ammonium carbamate into urea

A. Increases
B. Decreases
C. Remains unaltered
D. Can either increase or decrease depends on biuret content

View Answer

Question 33

Maximum nitrogen percentage is in

A. Ammonium sulphate
B. Calcium ammonium nitrate
C. Urea
D. Liquid ammonia

View Answer

Question 34

Ammonium nitrate is

A. Having about 40% N₂
B. Not hygroscopic
C. Not prone to explosive thermal decomposition
D. Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer

View Answer

Question 35

Electric process as compared to wet process (for the manufacture of phosphoric acid)

A. can use only high grade phosphate rock.
B. is used less frequently.
C. produces a valuable by-product called gypsum.
D. is weak acid process.

View Answer

Question 36

Rock phosphate constitutes mainly of

A. Fluorapatite
B. Di-calcium phosphate
C. Mono-calcium phosphate
D. Di-ammonium phosphate

View Answer

Question 37

Reaction of __________ acid with phosphate rock produces superphosphates.

A. Hydrochloric
B. Sulphuric
C. Nitric
D. Phosphoric

View Answer

Question 38

Which of the following does not come under the category of 'secondary nutrient' for plant growth?

A. Calcium
B. Magnesium
C. Sulphur
D. Oxygen

View Answer

Question 39

Ammonia synthesis reaction is

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

View Answer

Question 40

CO₂ present in reformed gas (obtained by steam reforming of naphtha) is removed by absorbing in

A. Mono-ethanolamine (MEA)
B. Slaked lime
C. Ammoniacal liquor
D. Methyl-Ethyl Ketone (MEK)

View Answer

Question 41

Commercial production of hydrogen for the manufacture of nitrogeneous fertilisers is done by

A. Steam reforming of naphtha and cracking of natural gas
B. Electrolysis of water
C. Cryogenic separation of hydrogen from coke oven gas
D. All of the above

View Answer

Question 42

Coal based fertiliser plants at Ramagundam (Andhra Pradesh) and Talchar (Orissa)

A. Use coal for heating purpose
B. Gasify coal to get hydrogen from coal gas
C. Use coal as filler in fertiliser
D. Use coal as conditioner in fertiliser

View Answer

Question 43

Steam reforming of naphtha produces ammonia synthesis gas. This is a/an __________ process.

A. Autocatalytic
B. Endothermic
C. Exothermic
D. Non-catalytic

View Answer

Question 44

Dehydration of ammonium carbamate produces

A. Urea
B. Biuret
C. Ammonia water
D. None of these

View Answer

Question 45

Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium

A. carbonate
B. phosphate
C. bicarbonate
D. silicate

View Answer

Question 46

Ammonium nitrate (a fertiliser) is coated with limestone powder to

A. increase its nitrogen content.
B. cut down its production cost.
C. avoid the risk of explosion.
D. add extra nutrient as fertiliser.

View Answer

Question 47

In the manufacture of H₃ PO₄ (ortho), ; strong H₂ SO₄ leaching wet process as compared to electric furnace process

A. Uses lower grade phosphate rock
B. Requires lower capital investment in the plant
C. Produces lower purity acid
D. Is very costly

View Answer

Question 48

Heating a mixture of phosphate rock, coke and sand in an electric furnace produces

A. Phosphoric acid
B. Ammonium phosphate
C. Phosphorous
D. Superphosphate

View Answer

Question 49

Sodium tri poly phosphate (STPP) is chemically represented as

A. Na₅P3O₁₀
B. Na₄P3O₈
C. Na₃P4O₆
D. Na₂PO₄

View Answer

Question 50

Pick out the wrong statement.

A. Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported under water.
B. Apatite is the principal material present in phosphate rock which is chemically Ca10 (PO4)6 (F, Cl, OH).
C. Urea is more hygroscopic than ammonium nitrate.
D. Nitrogen fixation means the process of bringing atmospheric nitrogen into combination i.e. into nitrogen compound form.

View Answer

Question 51

__________ is required more for leafy crops.

A. Nitrogen
B. Phosphorous
C. Potassium
D. Carbon

View Answer

Question 52

Urea is represented as

A. NH₂.CO.NH₂
B. NH₃CO.CH₃
C. NH.CO₂.NH
D. NH₃.CO₂.NH₃

View Answer

Question 53

Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas?

A. Water
B. Naphtha
C. Tar
D. Coal/coke oven gas

View Answer

Question 54

Vetrocoke solution is

A. A mixture of K₂CO₃ and As₂O₃
B. K₂SO₄
C. A mixture of Na₂CO₃ and As₂O₃
D. Na₂SO₄

View Answer

Question 55

Fertiliser plants get their N₂ requirements

A. By fractionation of liquified air
B. By dissociating oxides of nitrogen
C. From coal gas (coke oven gas)
D. From producer gas

View Answer

Question 56

Hydrogen content of coke oven gas is __________ percent.

A. 4
B. 22
C. 58
D. 84

View Answer

Question 57

Fertiliser value of a nitrogeneous fertiliser is expressed in terms of its __________ content.

A. N₂
B. KNO₃
C. NO₂
D. NHO₃

View Answer

Question 58

During nitric acid manufacture, catalytic oxidation of ammonia at 800°C in presence of platinum catalyst produces nitrogen oxide. Conversion of NH₃ to NO is about __________ percent.

A. 38
B. 68
C. 82
D. 98

View Answer

Question 59

Liquid ammonia is not used as such a fertiliser in tropical countries like India, because

A. Its N₂ content is very low
B. It is very costly
C. It will evaporate on spraying
D. It is not available

View Answer

Question 60

Catalyst used in the oxidation of ammonia is

A. Platinum-beryllium
B. Platinum-rhodium
C. Cobalt-molybdenum
D. Platinum-molybdenum

View Answer

Question 61

Pick out the wrong statement.

A. Dehydration of ammonium carbamate to produce urea is endothermic
B. Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable
C. Gypsum (CaSO₄. 2H₂O) is obtained as a by-product in the wet process for manufacture of ortho-phosphoric acid
D. Phosphate rock when reacted with dilute H₂SO₄ produces superphosphate

View Answer

Question 62

Nitrogenous fertiliser is required

A. During the early stage of growth to promote development of stem and leaves
B. For accelerating fruit formation in later stage of growth
C. To lessen the effect of excessive potash application
D. None of these

View Answer

Question 63

Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of __________ this is normally not done.

A. Increased biuret formation
B. High corrosion rate
C. Increased cost of equipment
D. All of the above

View Answer

Question 64

NPK fertiliser is a __________ fertiliser.

A. Complex
B. Mixed
C. Nitrogenous
D. Phosphatic

View Answer

Question 65

Conversion achieved in HNO₃ synthesis with the use of platinum catalyst is about 95-97%. The rate of formation of nitrogen dioxide from the oxidation of nitric acid is favoured by

A. Decreasing the pressure
B. Decreasing the temperature
C. Increasing the temperature
D. None of these

View Answer

Question 66

During conversion of ammonium carbamate into urea, presence of large excess of water

A. Increases the yield of urea
B. Adversely affects the yield of urea
C. Reduces the evaporator load by diluting the urea solution
D. Does not affect the yield of urea

View Answer

Question 67

In calcium ammonium nitrate (CAN) fertil-ser

A. nitrate nitrogen is quick acting
B. ammoniacal nitrogen is quick acting
C. nitrate nitrogen is slower acting
D. none of these

View Answer

Question 68

Fertilizer plant getting its hydrogen requirement partly from coke oven gas is situated at

A. Rourkela (under SAIL)
B. Barauni (under HFC)
C. Nangal (under NFL)
D. Talchar (under FCI)

View Answer

Question 69

Effectiveness of a fertiliser is independent of the

A. Nature of soil
B. Type of crop
C. PH of soil
D. None of these

View Answer

Question 70

Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the

A. Osmotic pressure of the soil water becomes less than that of the plant sap
B. Soil becomes too alkaline
C. Osmotic pressure of the soil water becomes higher than that of the plant sap
D. Soil becomes too acidic

View Answer

Question 71

CaH₄(PO₄)₂ is the chemical formula of

A. Superphosphate
B. Triple superphosphate
C. Calcium phosphate
D. Meta phosphoric acid

View Answer

Question 72

The main constituent of rock phosphate is

A. Mono-calcium phosphate
B. Di-calcium phosphate
C. Fluorspar
D. None of these

View Answer

Question 73

Main component of bone ash is

A. Calcium sulphate
B. Calcium phosphate
C. Calcium carbonate
D. Sodium phosphate

View Answer

Question 74

P2O5 content in triple superphosphate is about __________ percent.

A. 42-50
B. 15-20
C. 85-90
D. 70-75

View Answer

Question 75

Fertiliser plants get their N2 requirements

A. by fractionation of liquified air.
B. by dissociating oxides of nitrogen.
C. from coal gas (coke oven gas).
D. from producer gas.

View Answer

Question 76

Triple superphosphate which contains about 46% P₂O₅ is produced by the reaction of phosphate rock with ortho phosphoric acid of____percent concentration.

A. 25-28
B. 52-54
C. 75-80
D. > 98

View Answer

Question 77

Catalyst used in steam reforming of naphtha is

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

View Answer

Question 78

Temperature and pressure in urea autoclave is

A. 120°C and 300 atm
B. 190°C and 200 atm
C. 400°C and 550 atm
D. 200°C and 10 atm

View Answer

Question 79

__________ catalyst is used in the production of urea from CO₂ and NH₃.

A. Vanadium pentoxide
B. No
C. Alumina
D. Nickel

View Answer

Question 80

Nitrogenous fertiliser is required

A. during the early stage of growth to promote development of stem and leaves.
B. for accelerating fruit formation in later stage of growth.
C. to lessen the effect of excessive potash application.
D. none of these.

View Answer

Question 81

Vetrocoke solution is

A. a mixture of K2CO3 and As2O3.
B. K2SO4.
C. a mixture of Na2CO3 and As2O3.
D. Na2SO4.

View Answer

Question 82

Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at __________ °C.

A. 250-300
B. 500-750
C. 950-1050
D. 1400-1450

View Answer

Question 83

Both white phosphorous as well as red phosphorous

A. Are soluble in CS₂
B. Burns when heated in air
C. Reacts with hot caustic soda solution to give phosphine
D. All of the above

View Answer

Question 84

Dehydration of ammonium carbamate to yield urea is a/an __________ reaction.

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

View Answer

Question 85

Which fertiliser is made (using coke oven gas) in by products plant of an integrated steel plant?

A. Urea
B. CAN
C. Ammonium sulphate
D. Superphosphate

View Answer

Question 86

Liquid ammonia and 60% nitric acid reaction (which produces ammonium nitrate) is

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

View Answer

Question 87

Promoter used in NH₃ synthesis catalyst is

A. K₂O
B. SiO₃
C. V₂O₅
D. U₂O₃

View Answer

Question 88

Biuret formation in urea is kept at minimum (< 1 %), because it is

A. Corrosive in nature
B. Toxic and harmful to some crops
C. Helpful in decomposition of urea
D. Explosive in nature

View Answer

Question 89

Reaction of dilute sulphuric acid with phosphate rock produces

A. phosphoric acid
B. superphosphate
C. triple superphosphate
D. gypsum

View Answer

Question 90

Urea is formed only

A. in liquid phase
B. in vapour phase
C. at very high temperature
D. at very low pressure (vacuum)

View Answer

Question 91

A nitrogenous fertiliser contains 20% N₂. It could be

A. Ammonium nitrate
B. Calcium ammonium nitrate (CAN)
C. Urea
D. Ammonium chloride

View Answer

Question 92

Potassic fertilisers

A. Are useful during early stage of the plant growth
B. Stimulate early growth and accelerate seeding
C. Help in development of starches of potatoes and grain
D. None of these

View Answer

Question 93

Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the

A. Presence of an inert atmosphere
B. Presence of a reducing atmosphere
C. Absence of air
D. Presence of an oxidising atmosphere

View Answer

Question 94

In an ammonia plant, the purge off is essential to

A. Maintain inert gas concentration within a limit
B. Remove excess poisonous gases
C. Maintain H₂ : N₂ ratio at 3 :1
D. Remove uncondensed ammonia vapour

View Answer

Question 95

Optimum reaction temperature in steam reforming of naphtha is __________ °C.

A. 700 - 1000
B. 300 - 450
C. 1500-1700
D. 100-200

View Answer

Question 96

Catalytic ammonia synthesis reaction as in Haber's process is

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

View Answer

Question 97

A fertiliser contains 82% N₂. It could be

A. Urea
B. Liquid NH₃
C. Ammonium nitrate
D. None of these

View Answer

Question 98

Ammonium nitrate (is mixed with limestone) is not used as fertiliser as such, because

A. It is hygroscopic and explosive in nature
B. It is highly acidic in nature
C. It is a liquid at room temperature
D. Its nitrogen content is very less

View Answer

Question 99

Phosphorus vapour comprises of

A. P
B. P₂
C. P₃
D. P₄

View Answer

Question 100

Conditioners like finely divided peat are added to the fertiliser to

A. Counteract burning
B. Avoid caking & hardening
C. Produce bulk
D. Increase its solubility

View Answer

Question 101

Lower temperature and large excess of ammonia in urea melt

A. increases biuret formation
B. decreases biuret formation
C. is undersirable
D. does not effect biuret formation

View Answer

Question 102

Urea is a __________ fertiliser.

A. nitrogenous
B. potassic
C. phosphatic
D. none of these

View Answer

Question 103

In the manufacture of urea, the intermediate chemical formed is

A. Biuret
B. Ammonium carbamate
C. Ammonium carbonate
D. None of these

View Answer

Question 104

Chemical formula of biuret is

A. NH₂.CO.NH₂
B. NH₃.COO.NH₃
C. NH₂CONHCONH₂
D. NH₄COONH₂

View Answer

Question 105

Plant tranquillisers

A. Hold back stem growth and halt plants at a desired height
B. Cause early maturation of plants
C. Accelerate ripening of food and grain
D. Produce seedless fruit

View Answer

Question 106

Which is a catalyst promoter used in catalytic ammonia synthesis reaction?

A. Al₂O₃
B. Cr₂O₃
C. K₂O
D. MnO

View Answer

Question 107

Heating of orthophosphoric acid to about 900°C, produces

A. Metaphosphoric acid
B. Pyrophosphoric acid
C. No change in it
D. None of these

View Answer

Question 108

Action of phosphoric acid on rock phosphate produces

A. superphosphate
B. triple superphosphate
C. nitrophosphate
D. diammonium phosphate

View Answer

Question 109

Steam reforming of naphtha is a source of hydrogen production for nitrogeneous fertiliser industry. What is the usual ratio of steam to carbon maintained in the process of steam reforming of naphtha ?

A. 1.5:1
B. 3.5:1
C. 10:01
D. 15:01

View Answer

Question 110

Conditioners like finely divided peat are added to the fertiliser to

A. counteract burning.
B. avoid caking & hardening.
C. produce bulk.
D. increase its solubility.

View Answer

Question 111

Neutralisation of nitric acid with ammonia to produce ammonium nitrate is a/an __________ reaction.

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

View Answer

Question 112

Red phosphorous is changed into white phosphorous by

A. heating in presence of light.
B. melting under pressure.
C. vaporisation followed by condensation.
D. none of these.

View Answer

Question 113

Low grade coal is __________ to produce ammonia synthesis gas.

A. Hydrogenated
B. Liquefied
C. Gasified
D. Dehydrogenated

View Answer

Question 114

Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition?

A. Electrolysis of water
B. Cryogenic removal of H₂ from coke oven gas
C. Steam reforming of naphtha
D. Natural gas cracking

View Answer

Question 115

Reaction of orthophosphoric acid with phosphate rock produces

A. Superphosphate
B. Triple superphosphate
C. Metaphosphoric acid
D. Monoammonium phosphate

View Answer

Question 116

Fauser Monte Catini converter is used for

A. Ammonia synthesis (e.g. at FCI Sindri)
B. Methanation of CO and CO₂
C. Shift conversion (i.e. CO to CO₂)
D. None of these

View Answer

Question 117

Which one of the following is used as a nitrogenous fertiliser, as a weed killer in the onion fields and for correcting acidic soils?

A. Urea
B. CAN
C. Ammonium sulphate
D. Calcium cyanamide

View Answer

Question 118

Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in

A. Low bulk density product
B. Biuret formation
C. Non-spherical prills
D. Substantially wet non-flowing and sticky product

View Answer

Question 119

H₃PO₄ is the chemical formula of __________ phosphoric acid.

A. Pyro
B. Ortho
C. Meta
D. None of these

View Answer

Question 120

Main constituent of phosphate rock is

A. Ammonium phosphate
B. Flour apatite
C. Calcium fluoride
D. Calcium phosphate

View Answer

Question 121

Phosphoric acid is produced in wet process from phosphate rock and

A. dilute H2SO4
B. concentrated H2SO4
C. concentrated NHO3
D. concentrated HCl

View Answer

Question 122

Yield of elemental phosphorous from rock phosphate is about __________ percent.

A. 1-2
B. 15-25
C. 40-45
D. 60-65

View Answer

Question 123

Dehydration of ammonium carbamate (to produce urea) is a/an __________ reaction.

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

View Answer

Question 124

Pick out the wrong statement.

A. Nitrogen is normally supplied in fertiliser either in ammoniacal or the nitrate form, from which the soil takes it up in the form of ammonium ions or nitrate ions and forms amino acids
B. Calcium present in the fertiliser helps in correcting the soil acidity
C. Particle size range of a good grannular fertiliser is 10-15 mesh and it contains less moisture as compared to finely divided powder form of fertiliser
D. Ammonium nitrate fertiliser is obtained as a by-product in an integrated steel plant having by-product coke ovens

View Answer

Question 125

Phosphatic fertilisers

A. Are useful during early stage of the plant growth
B. Accelerate fruit formation in later stages of growth
C. Lessen the effect of excessive nitrogen application
D. None of these

View Answer

Question 126

The optimum size of the ammonia plant is __________ tons/day.

A. 10
B. 100
C. 1000
D. 1000C

View Answer

Question 127

Which of the following does not come under the category of'primary nutrient' for plant growth?

A. Potassium
B. Nitrogen
C. Phosphorous
D. Sulphur

View Answer

Question 128

The fertiliser plant getting hydrogen by electrolysis of water is situated at

A. Namrup
B. Nangal
C. Rourkela
D. Korba

View Answer

Question 129

Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550°C), because at low temperature

A. Rate of reaction is very low
B. Very high pressure is required resulting in costly pressure vessel
C. Space velocity of gas is very low resulting in decreased conversion
D. None of these

View Answer

Question 130

In __________ converter for ammonia synthesis, the catalyst is arranged in the form of a single continuous bed.

A. Fauser-Monte Catini
B. Claude
C. Udhe
D. Kellog

View Answer

Question 131

Phosphoric acid is produced in wet process from phosphate rock and

A. Dilute H₂SO₄
B. Concentrated H₂SO₄
C. Concentrated NHO₃
D. Concentrated HCl

View Answer

Question 132

A fertiliser plant is classified as a gas based fertiliser plant, when it uses __________ gas as a source of hydrogen for the manufacture of ammonia.

A. Coke oven
B. Producer
C. Natural
D. Coal

View Answer

Question 133

Vapor phase reaction of ammonia & nitric acid to produce ammonium nitrate is termed as the __________ process.

A. Haber's
B. Stengel
C. Le-chatlier's
D. Du-pont's

View Answer

Question 134

Leaching of phosphate rock by strong __________ acid produces phosphoric acid.

A. Sulphuric
B. Hydrochloric
C. Either A or B
D. Neither A nor B

View Answer

Question 135

Ammonium sulphate fertiliser is

A. the highest concentration nitrogenous fertiliser.
B. the best fertiliser for paddy.
C. a basic fertiliser.
D. a neutral fertiliser.

View Answer

Question 136

CO2 present in reformed gas (obtained by steam reforming of naphtha) is removed by absorbing in

A. mono-ethanolamine (MEA)
B. slaked lime
C. ammoniacal liquor
D. Methyl-Ethyl Ketone (MEK)

View Answer

Question 137

Catalyst used in steam reforming of naphtha is

A. Bauxite
B. Cobalt
C. Nickel oxide on alumina support
D. Chromium

View Answer

Question 138

__________ is the undesirable by-product produced in the manufacture of urea.

A. Ammonium carbonate
B. Biuret
C. Carbon dioxide
D. Ammonium carbamate

View Answer

Question 139

Ammonia synthesis gas is produced from fuel oil by

A. Steam reforming
B. Hydrocracking
C. Partial oxidation
D. Hydrogenation

View Answer

Question 140

Urea is represented as

A. NH2.CO.NH2
B. NH3CO.CH3
C. NH.CO2.NH
D. NH3.CO2.NH3

View Answer

Question 141

Prilling tower is found in the flowsheet for the manufacture of

A. ammonia
B. urea
C. superphosphate
D. triple superphosphate

View Answer

Question 142

Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at __________ °C in absence of air.

A. 50-80
B. 250-400
C. 1000-1200
D. 800-900

View Answer

Question 143

Color of nitric acid is light yellow due to the presence of

A. NO
B. NO₂
C. N₂H₅
D. NH₃

View Answer

Question 144

Flushing liquor used for cooling coke oven gas constitutes of

A. Ammoniacal liquor
B. K₂CO₃ solution
C. Dilute H₂SO₄
D. Dilute HCl

View Answer

Question 145

Ammonium sulphate can be produced by reacting gypsum with

A. ammonia
B. ammonium carbonate
C. nitric acid
D. none of these

View Answer

Question 146

Pick out the wrong statement.

A. Loamy soil is the best soil for vigorous plant growth, while the clayey soil is solid and hence the plant roots penetrate with difficulty
B. Large excess use of nitrogenous fertiliser in land causes the problem of diarrhoea and cyanosis
C. Application of large excess of potassic fertiliser in soil increases the valuable carotene in fruits and vegetables
D. Cereal crops grown on alkaline soil absorb higher amount of flourides thereby spreading flourosis

View Answer

Question 147

Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of

A. Phosphoric acid
B. Superphosphate
C. Phosphorous
D. Triple superphosphate

View Answer

Question 148

NPK means a __________ fertiliser.

A. Mixed
B. Potassic
C. Liquid
D. Solid

View Answer

Question 149

Liquid ammonia is not used as such a fertiliser in tropical countries like India, because

A. its N2 content is very low.
B. it is very costly.
C. it will evaporate on spraying.
D. it is not available.

View Answer

Question 150

Commercial fertilisers are available mostly in the form of

A. powder
B. grannules
C. lumps
D. flakes

View Answer

Question 151

Reaction of calcium fluorapatite with sulphuric acid produces

A. Ortho-phosphoric acid
B. Simple superphosphate
C. Triple superphosphate
D. Red phosphorous

View Answer

Question 152

Chemical formula of metaphosphoric acid is

A. H₃PO₄
B. H₄P₂O₇
C. HPO₃
D. Same as that of pyrophosphoric acid

View Answer

Question 153

Steam reforming of naphtha is a source of hydrogen production for nitrogeneous fertiliser industry. What is the usual ratio of steam to carbon maintained in the process of steam reforming of naphtha?

A. 1.5:1
B. 3.5:1
C. 10:1
D. 15:1

View Answer

Question 154

Reaction of nitric acid and sulphuric acid with phosphate rock produces

A. Nitrophosphate
B. Diammonium phosphate
C. Tricresyl phosphate
D. Tributyl phosphate

View Answer

Question 155

Catalyst used in Haber's process for ammonia production is

A. reduced iron oxide
B. nickel
C. vanadium pentoxide
D. silica gel

View Answer

Question 156

Heating of orthophosphoric acid to 250°C produces

A. metaphosphoric acid
B. pyrophosphoric acid
C. no change in it
D. none of these

View Answer

Question 157

Which of the following gasifiers can be attached to coal based fertiliser plants?

A. Lurgi (high pressure) gasifier
B. Kopper-Totzek gasifier
C. Gasifier working at 20 atm
D. Gasifier working at 40 atm

View Answer

Question 158

Pick out the wrong statement.

A. All the nitrogenous fertilisers are not soluble in water.
B. A straight fertiliser contains only one nutrient.
C. Calcium cynamide is used as weed killer in onion fields.
D. The phosphorous nutrient makes the plant stem stronger and increases its branches.

View Answer

Question 159

Reaction of cresylic acid with __________ produces tricresyl phosphate.

A. Phosphorous pentoxide
B. Phosphorous oxychloride
C. Ammonium phosphate
D. Calcium phosphate

View Answer

Question 160

Out of the following, N₂ content is minimum in

A. Urea
B. Ammonium nitrate
C. Ammonium sulphate
D. Ammonium chloride

View Answer

Question 161

An increase in the NH₃/CO₂ ratio in urea manufacture results in

A. Increased degree of conversion of CO₂ to urea
B. Decreased degree of conversion of NH₃ to urea
C. Decreased yield of urea
D. Decreased specific volume of molten mass

View Answer

Question 162

Which of the following set of conditions is favourable for the maximum yield of ammonia by Haber's process?

A. High pressure, low reactants concentration, high temperature
B. High pressure, low reactants concentration, low temperature
C. High pressure, high reactants concentration, low temperature
D. Low pressure, high reactants concentration, low temperature

View Answer

Question 163

Red phosphorous is changed into white phosphorous by

A. Heating in presence of light
B. Melting under pressure
C. Vaporisation followed by condensation
D. None of these

View Answer

Question 164

Pick out the wrong statement.

A. Green acid' is the other name of phosphoric acid produced by the reaction of phosphate rock & sulphuric acid
B. Chemically unreactive nature of red phosphorous is due to its polymeric structure
C. Red phosphorous is the most reactive allotropic form of phosphorous
D. Red phosphorous, which is used in the manufacture of safety matches, is converted into white phosphorous by vaporisation followed by condensation

View Answer

Question 165

Iron is not used alone as a catalyst in ammonia synthesis, because

A. Its activity declines rapidly, if heated to above 520°C
B. It decomposes ammonia
C. It gets oxidised above 500°C
D. None of these

View Answer

Question 166

Ammonium sulphate fertiliser is

A. The highest concentration nitrogenous fertiliser
B. The best fertiliser for paddy
C. A basic fertiliser
D. A neutral fertiliser

View Answer

Question 167

Nitrogen content of calcium ammonium nitrate (CAN) is __________ percent.

A. 10
B. 25
C. 50
D. 80

View Answer

Question 168

H3PO4 is the chemical formula of __________ phosphoric acid.

A. pyro
B. ortho
C. meta
D. none of these

View Answer

Question 169

Urea is a better fertilizer than ammonium sulphate, because

A. It is cheaper
B. Nitrogen content is higher
C. It is not poisonous
D. It is easy to manufacture

View Answer

Question 170

Which of the following fertilisers is used as a cattle feed?

A. Urea
B. Calcium ammonium nitrate
C. Superphosphate
D. Ammonium sulphate

View Answer

Question 171

Raw materials required for the production of CAN (Calcium ammonium nitrate) is NH₃

A. HNO₃ & limestone
B. CO₂ & H₂SO₄
C. HNO₃ & NH₄Cl
D. CO₂ & KNO₃

View Answer

Question 172

__________ is not a fertiliser.

A. Calcium ammonium nitrate
B. Ferrous sulphate
C. Liquid ammonia
D. Ammonium sulphate

View Answer

Question 173

Nitrolime is

A. Calcium nitrate
B. Calcium ammonium nitrate
C. A mixture of nitric acid and lime
D. A mixture of ammonium nitrate and calcium nitrate

View Answer

Question 174

P₂O₅ content in superphosphate is about __________ percent.

A. 30-35
B. 15-20
C. 65-70
D. 85-90

View Answer

Question 175

A mixture of phosphate rock __________ is heated in an electric furnace to produce phosphorous.

A. Salt & coke
B. Sand & coke
C. And coke
D. And sand

View Answer

Question 176

Monte catini process is a widely used process for the manufacture of

A. Urea
B. Calcium ammonium nitrate
C. Triple superposphate
D. None of these

View Answer

Question 177

Urea (a nitrogeneous fertiliser) is produced from carbon dioxide and

A. Nitric acid
B. Ammonia
C. Ammonium nitrate
D. Nitric oxide

View Answer

Question 178

Ammonium phosphate is a __________ fertiliser.

A. Nitrogenous
B. Phosphatic
C. Complex
D. Mixed

View Answer

Question 179

Potassic fertiliser is graded based on its __________ content.

A. KCl
B. K₂O
C. KNO₃
D. K₂SO₄

View Answer

Question 180

Which of the following nitrogenous fertilisers has the highest percentage of nitrogen?

A. Calcium nitrate
B. Calcium ammonium nitrate (CAN)
C. Urea
D. Ammonium sulphate

View Answer

Question 181

Gas based fertiliser plants use

A. Natural gas as a source of hydrogen
B. Natural gas as heating medium
C. Coal gas as a source of hydrogen
D. Coal gas as heating medium

View Answer

Question 182

Base suspension fertiliser essentially contains

A. 13% N₂ and 43% P₂O₅
B. 43% N₂ and 13% P₂O₅
C. 43% N₂ and 13% K₂O
D. 43% K₂O and 43% P₂O₅

View Answer

Question 183

Raw materials for urea production are

A. CO₂ and N₂
B. CO₂, H₂ and N₂
C. NH₃ and CO
D. HNO₃ and CaCO₃

View Answer

Question 184

(CH₃ C₆ H₄)₃ PO₄ is the chemical formula of

A. Triple superphosphate
B. Tricresyl phosphate
C. Flourapatite
D. Superphosphate

View Answer

Question 185

Which of the following solvents is used for the extraction of H₃PO₄ from CaCl₂ solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching?

A. Iso propyl alcohol
B. Butyl alcohol
C. Toluene
D. Hexane

View Answer

Question 186

5-10-5 fertilisers mean that they contain

A. 5, 10, 5% respectively of N₂, P₂O₅ and K₂O
B. Only 5 to 10% active fertiliser constituents
C. 5 to 10% filler & carrier of soil conditioners
D. None of these

View Answer

Question 187

Maximum stability of white phosphorous is at

A. Very high pressure
B. Atmospheric pressure
C. Room temperature
D. >600°C

View Answer

Question 188

Temperature and pressure in ammonia converter is

A. 200 atm, 1000°C
B. 450 atm, 200°C
C. 450 atm, 550°C
D. 450 atm, 1000°C

View Answer

Question 189

Rock phosphate used for the production of phosphatic fertiliser is mined at

A. Amjhor (Jharkhand)
B. Talchar (Orissa)
C. Bailladella (M.P.)
D. Kiriburu (Bihar)

View Answer

Question 190

(CH3 C6 H4)3 PO4 is the chemical formula of

A. triple superphosphate
B. tricresyl phosphate
C. flourapatite
D. superphosphate

View Answer

Question 191

Catalyst used in desulphurisation of naphtha is

A. Co-Mo
B. Pt-Rh
C. Silica gel
D. Nickel

View Answer

Question 192

Which is the most suitable fertiliser for paddy ?

A. CAN
B. Ammonium sulphate
C. Ammonium nitrate
D. Superphosphate

View Answer

Question 193

Pick out the correct statement.

A. Reaction of NH₃ with HNO₃ to produce (NH₄)₂NO₃ is endothermic
B. With increase in NH₃/CO₂ ratio, urea yield decreases for a given temperature, pressure and total feed rate
C. Biuret (an intermediate during urea manufacture) is toxic to seeds and animals
D. Both B and C

View Answer

Question 194

Which is the most suitable fertiliser for paddy?

A. CAN
B. Ammonium sulphate
C. Ammonium nitrate
D. Superphosphate

View Answer

Question 195

Formation of ammonium carbamate by reaction of NH₃ with CO₂ is a/an __________ reaction.

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

View Answer

Question 196

__________ is the most suitable fertiliser for paddy.

A. Urea
B. Ammonium sulphate
C. Superphosphate
D. Potassium nitrate

View Answer

Question 197

Which of the following is not a mixed fertiliser?

A. Nitrophosphate
B. Calcium ammonium nitrate (CAN)
C. Ammonium phosphate
D. None of these

View Answer

Question 198

In natural gas, the C/H ratio (by weight) varies in the range of

A. 3-4
B. 8-10
C. 15-17
D. 20-25

View Answer

Question 199

Electric process as compared to wet process (for the manufacture of phosphoric acid)

A. Can use only high grade phosphate rock
B. Is used less frequently
C. Produces a valuable by-product called gypsum
D. Is weak acid process

View Answer

Question 200

Which of the following fertilisers contains the least percentage of nitrogen?

A. Liquid ammonia
B. Urea
C. Ammonium phosphate
D. Ammonium sulphate

View Answer

Question 201

Bio-fertilisers are cheaper, renewable and pollution free. They improve the __________ of the soil.

A. Nutrient supply
B. Texture
C. Water holding capacity
D. All of the above

View Answer

Question 202

Pick out the wrong statement.

A. 'Green acid' is the other name of phosphoric acid produced by the reaction of phosphate rock & sulphuric acid.
B. Chemically unreactive nature of red phosphorous is due to its polymeric structure.
C. Red phosphorous is the most reactive allotropic form of phosphorous.
D. Red phosphorous, which is used in the manufacture of safety matches, is converted into white phosphorous by vaporisation followed by condensation.

View Answer

Question 203

Multistage operation (as in the case of catalytic oxidation of SO₂) is not carried out for NH₃ synthesis, because of

A. Comparatively higher pressure drop
B. High cost of the high pressure vessel used for the reactor
C. Higher pumping cost
D. Chances of entrainment and disturbance of catalyst bed

View Answer

Question 204

Fertiliser produced during soda ash manufacture by dual process is ammonium

A. Chloride
B. Sulphate
C. Nitrate
D. None of these

View Answer

Question 205

Phosphorus vapour comprises of

A. P
B. P2
C. P3
D. P4

View Answer

Question 206

Though liquid ammonia itself is a fertiliser (with 82% nitrogen content) yet it is commonly not used as such in a tropical country like India, because it

A. Has a pungent smell
B. Vaporises at normal temperature
C. Is toxic and highly corrosive
D. Is in short supply

View Answer

Question 207

Reaction of anhydrous liquid ammonia with orthophosphoric acid produces

A. Ammonium phosphate
B. Superphosphate
C. Triple superphosphate
D. None of these

View Answer

Question 208

Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N2 & H2 is high. The presence of promoter along with the catalyst helps in __________ of the catalyst.

A. stabilisation
B. increasing the effectiveness
C. improving the strength & heat resistance
D. all a, b & c

View Answer

Question 209

HPO₃ is the chemical formula of __________ phosphoric acid.

A. Pyro
B. Ortho
C. Meta
D. None of these

View Answer

Question 210

The essential ingradient of all the synthesis gas is

A. H₂
B. O₂
C. CO₂
D. N₂

View Answer

Question 211

P₂O₅ percentage in the phosphoric acid produced by wet process is about

A. 10
B. 30
C. 50
D. 70

View Answer

Question 212

Phosphatic fertiliser is graded based on its __________ content.

A. P₂O₃
B. PCl5
C. P₂O₅
D. H₃PO₄

View Answer

Question 213

Potassic fertilisers do not promote the development of

A. Stems & leaves during early stage of plant growth
B. Starches of potatoes & grains
C. Sugar of fruits & vegetables
D. Fibrous materials of plants

View Answer

Question 214

Nitrogen content of a nitrogenous fertiliser is 35%. It could be

A. Urea
B. Ammonium nitrate
C. Calcium ammonium nitrate (CAN)
D. Ammonium sulphate

View Answer

Question 215

Superphosphate is manufactured by reacting phosphate rock with

A. acetic acid
B. sulphuric acid
C. aluminium chloride
D. none of these

View Answer

Question 216

Reaction of phosphate rock with 98% H₂SO₄ produces

A. Orthophosphoric acid
B. Superphosphate
C. White phosphorous
D. None of these

View Answer

Question 217

Nitrogen content of urea is about __________ percent.

A. 10
B. 46
C. 80
D. 94

View Answer

Question 218

Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth?

A. Nitrogeneous fertiliser
B. Potassic fertiliser
C. Phosphatic fertiliser
D. None of these

View Answer

Question 219

Which nutrient in fertiliser makes the plant stems stronger and increases branching?

A. Nitrogen
B. Phosphorous
C. Potassium
D. Calcium

View Answer

Question 220

A potassic fertiliser contains 50% K₂O. It could be

A. Potassium sulphate
B. Potassium chloride
C. A mixture of NaCl+ KCl
D. None of these

View Answer

Question 221

I argest capacity nitrogenous fertiliser plants (2700 tons of NH₃ per day) (2 Nos) in India are located at

A. Thal-Vaishet (under RCF in Maharashtra) and Hazira (under IFFCO in Gujarat)
B. Talchar (Orissa) and Ramagundam (A.P.) both under FCI
C. Korba (M.P.) and Talchar (Orissa) both under FCI
D. Haldia (W.B) and Namrup (Assam) both under HFC

View Answer

Question 222

Nitric acid is produced on commercial scale in a fertiliser plant by

A. Oxidation of ammonia
B. CaNO₃ + H₂SO₄ reaction
C. Passing air through high voltage electric arc
D. None of these

View Answer

Question 223

Nitrolime is chemically known as

A. Calcium nitrate
B. Ammonium nitrate
C. Calcium ammonium nitrate (CAN)
D. None of these

View Answer

Question 224

Nitro-phosphate (manufactured at Trom-bay) is a __________ fertiliser.

A. Mixed
B. Complex
C. Highly hygroscopic
D. Highly explosive

View Answer

Question 225

Triple superphosphate is made by reacting phosphate rock with __________ acid.

A. Phosphoric
B. Nitric
C. Sulphuric
D. Hydrochloric

View Answer

Question 226

Fertiliser plant making ammonium sulphate employing gypsum-ammonia reaction (usual practice is to use ammonia and sulphuric acid) is located at

A. Rourkela (under SAIL)
B. Bokaro (under SAIL)
C. Sindri (under FCI)
D. Baroda (under G.S.F.C.)

View Answer

Question 227

During conversion of ammonium carbamate into urea, presence of large excess of water

A. increases the yield of urea.
B. adversely affects the yield of urea.
C. reduces the evaporator load by diluting the urea solution.
D. does not affect the yield of urea.

View Answer

Question 228

Which is a catalyst promoter used in catalytic ammonia synthesis reaction ?

A. Al2O3
B. Cr2O3
C. K2O
D. MnO

View Answer

Question 229

Pick out the wrong statement.

A. Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported under water
B. Apatite is the principal material present in phosphate rock which is chemically Ca₁₀ (PO₄)₆ (F, Cl, OH)
C. Urea is more hygroscopic than ammonium nitrate
D. Nitrogen fixation means the process of bringing atmospheric nitrogen into combination i.e. into nitrogen compound form

View Answer

Question 230

Which of the following is not a measure component necessarily to be present in fertilisers?

A. Nitrogen
B. Potassium
C. Phosphorous
D. Sulphur

View Answer

Question 231

Low grade phosphate rock can be used in electrical furnace, because

A. Of the better CaO/SiO₂ balance for slag formation
B. CaO content is less
C. It is cheap
D. It produces low cost product

View Answer

Question 232

Two gas based fertiliser plants are located in

A. Maharashtra and Gujarat
B. Maharashtra and Orissa
C. Gujarat and Madhya Pradesh
D. Jharkhand and Chattisgarh

View Answer

Question 233

A phosphatic fertiliser contains 16% P₂O₅. It could be

A. Dicalcium phosphate
B. Superphosphate
C. Triple superphosphate
D. None of these

View Answer