Fertilizer Technology MCQs

Option A: Loamy soil is the best soil for vigorous plant growth, while the clayey soil is solid and hence

Option B: Large excess use of nitrogenous fertiliser in land causes the problem of diarrhoea and cyanosis

Option C: Application of large excess of Potassic fertiliser in soil increases the valuable carotene in

Option D: Cereal crops grown on alkaline soil absorb higher amount of fluorides thereby spreading

Correct Answer: C. Application of large excess of Potassic fertiliser in soil increases the valuable carotene in
fruits and vegetables ✔

Option A: Yellow phosphorous which is the most reactive allotropic form of phosphorous is transported

Option B: Apatite is the principal material present in phosphate rock which is chemically Ca10 (PO4)6 (F,

Option C: Urea is more hygroscopic than ammonium nitrate

Option D: Nitrogen fixation means the process of bringing atmospheric nitrogen into combination i.e.

Correct Answer: Urea is more hygroscopic than ammonium nitrate ✔

Option A: Dehydration of ammonium carbamate to produce urea is endothermic

Option B: Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable

Option C: Gypsum (CaSO4. 2H2O) is obtained as a by-product in the wet process for manufacture of

Option D: Phosphate rock when reacted with dilute H2SO4 produces superphosphate

Correct Answer: Direct use of liquid ammonia as a fertiliser for a tropical country like India is suitable ✔

Option A: Nitrogen is normally supplied in fertiliser either in Ammoniacal or the nitrate form, from

Option B: Calcium present in the fertiliser helps in correcting the soil acidity

Option C: Particle size range of a good granular fertiliser is 10-15 mesh and it contains less moisture as

Option D: Ammonium nitrate fertiliser is obtained as a by-product in an integrated steel plant having byproduct

Correct Answer: D. Ammonium nitrate fertiliser is obtained as a by-product in an integrated steel plant having byproduct
coke ovens ✔

Option A: ‘Green acid’ is the other name of phosphoric acid produced by the reaction of phosphate rock

Option B: Chemically unreactive nature of red phosphorous is due to its polymeric structure

Option C: Red phosphorous is the most reactive allotropic form of phosphorous

Option D: Red phosphorous, which is used in the manufacture of safety matches, is converted into white

Correct Answer: Red phosphorous is the most reactive allotropic form of phosphorous ✔

Option A: Reaction of NH3 with HNO3 to produce (NH4)2NO3 is endothermic

Option B: With increase in NH3/CO2 ratio, urea yield decreases for a given temperature, pressure and

Option C: Biuret (an intermediate during urea manufacture) is toxic to seeds and animals

Option D: Both B. and C.

Correct Answer: B. With increase in NH3/CO2 ratio, urea yield decreases for a given temperature, pressure and
total feed rate ✔

Option A: All the nitrogenous fertilisers are not soluble in water

Option B: A straight fertiliser contains only one nutrient

Option C: Calcium cyanamide is used as weed killer in onion fields

Option D: The phosphorous nutrient makes the plant stem stronger and increases its branches

Correct Answer: All the nitrogenous fertilisers are not soluble in water ✔

Option A: Exothermic

Option B: Endothermic

Option C: Non-catalytic

Option D: Autocatalytic

Correct Answer: Exothermic ✔

Option A: Uses lower grade phosphate rock

Option B: Requires lower capital investment in the plant

Option C: Produces lower purity acid

Option D: Is very costly

Correct Answer: Produces lower purity acid ✔

Option A: Has a pungent smell

Option B: Vaporises at normal temperature

Option C: Is toxic and highly corrosive

Option D: Is in short supply

Correct Answer: Vaporises at normal temperature ✔

Option A: 4-5

Option B: 7-8

Option C: 9-10

Option D: 12-13

Correct Answer: 7-8 ✔

Option A: Liquid ammonia

Option B: Urea

Option C: Ammonium phosphate

Option D: Ammonium sulphate

Correct Answer: Ammonium phosphate ✔

Option A: Phosphoric acid

Option B: Ammonium phosphate

Option C: Phosphorous

Option D: Superphosphate

Correct Answer: Phosphorous ✔

Option A: Bauxite

Option B: Cobalt

Option C: Nickel oxide on alumina support

Option D: Chromium

Correct Answer: Nickel oxide on alumina support ✔

Option A: Exothermic

Option B: Endothermic

Option C: Autocatalytic

Option D: None of these

Correct Answer: Exothermic ✔

Option A: Hydrogenated

Option B: Liquefied

Option C: Gasified

Option D: Dehydrogenated

Correct Answer: Gasified ✔

Option A: Ammonium phosphate

Option B: Flour apatite

Option C: Calcium fluoride

Option D: Calcium phosphate

Correct Answer: Flour apatite ✔

Option A: Natural gas as a source of hydrogen

Option B: Natural gas as heating medium

Option C: Coal gas as a source of hydrogen

Option D: Coal gas as heating medium

Correct Answer: Natural gas as a source of hydrogen ✔

Option A: H3PO4

Option B: H4P2O7

Option C: HPO3

Option D: Same as that of Pyrophosphoric acid

Correct Answer: HPO3 ✔

Option A: Electrolysis of water

Option B: Cryogenic removal of H2 from coke oven gas

Option C: Steam reforming of naphtha

Option D: Natural gas cracking

Correct Answer: Electrolysis of water ✔

Option A: Ammonium nitrate

Option B: Calcium ammonium nitrate (CAN)

Option C: Urea

Option D: Ammonium chloride

Correct Answer: Calcium ammonium nitrate (CAN) ✔

Option A: HNO3 & limestone

Option B: CO2 & H2SO4

Option C: HNO3 & NH4Cl

Option D: CO2 & KNO3

Correct Answer: HNO3 & limestone ✔

Option A: Sulphuric

Option B: Hydrochloric

Option C: Either A. or B.

Option D: Neither A. nor B.

Correct Answer: C. Either A. or B. ✔

Option A: Nitrophosphate

Option B: Calcium ammonium nitrate (CAN)

Option C: Ammonium phosphate

Option D: None of these

Correct Answer: Calcium ammonium nitrate (CAN) ✔

Option A: Ammoniacal liquor

Option B: K2CO3 solution

Option C: Dilute H2SO4

Option D: Dilute HCl

Correct Answer: Ammoniacal liquor ✔

Option A: 5

Option B: 20

Option C: 50

Option D: 65

Correct Answer: 20 ✔

Option A: Exothermic

Option B: Endothermic

Option C: Autocatalytic

Option D: Catalytic

Correct Answer: Endothermic ✔

Option A: Are soluble in CS2

Option B: Burns when heated in air

Option C: Reacts with hot caustic soda solution to give Phosphine

Option D: All A., B., and C.

Correct Answer: Burns when heated in air ✔

Option A: Nitrogenous fertilisers

Option B: Phosphatic fertilisers

Option C: Potassic fertiliser

Option D: None of these

Correct Answer: Potassic fertiliser ✔

Option A: Ammonia

Option B: Urea

Option C: Superphosphate

Option D: Triple superphosphate

Correct Answer: Urea ✔

Option A: Meta-phosphoric acid

Option B: Pyrophosphoric acid

Option C: No change in it

Option D: None of these

Correct Answer: Meta-phosphoric acid ✔

Option A: Increase its nitrogen content

Option B: Cut down its production cost

Option C: Avoid the risk of explosion

Option D: Add extra nutrient as fertiliser

Correct Answer: Avoid the risk of explosion ✔

Option A: Calcium sulphate

Option B: Calcium phosphate

Option C: Calcium carbonate

Option D: Sodium phosphate

Correct Answer: Calcium phosphate ✔

Option A: Isopropyl alcohol

Option B: Butyl alcohol

Option C: Toluene

Option D: Hexane

Correct Answer: Butyl alcohol ✔

Option A: Ortho-phosphoric acid

Option B: Simple superphosphate

Option C: Triple superphosphate

Option D: Red phosphorous

Correct Answer: Simple superphosphate ✔

Option A: Steam reforming

Option B: Hydro-cracking

Option C: Partial oxidation

Option D: Hydrogenation

Correct Answer: Partial oxidation ✔

Option A: A mixture of K2CO3 and As2O3

Option B: K2SO4

Option C: A mixture of Na2CO3 and As2O3

Option D: Na2SO4

Correct Answer: A mixture of K2CO3 and As2O3 ✔

Option A: Fauser-Montecatini

Option B: Claude

Option C: Uhde

Option D: Kellogg

Correct Answer: Claude ✔

Option A: Calcium nitrate

Option B: Calcium ammonium nitrate (CAN)

Option C: Urea

Option D: Ammonium sulphate

Correct Answer: Urea ✔

Option A: Acetic acid

Option B: Sulphuric acid

Option C: Aluminium chloride

Option D: None of these

Correct Answer: Sulphuric acid ✔

Option A: Maintain inert gas concentration within a limit

Option B: Remove excess poisonous gases

Option C: Maintain H2 : N2 ratio at 3 :1

Option D: Remove uncondensed ammonia vapour

Correct Answer: Maintain H2 : N2 ratio at 3 :1 ✔

Option A: Thermal cracking

Option B: Steam reforming

Option C: Partial oxidation

Option D: Hydrogenation

Correct Answer: Steam reforming ✔

Option A: NH2.CO.NH2

Option B: NH3.COO.NH3

Option C: NH2CONHCONH2

Option D: NH4COONH2

Correct Answer: NH2CONHCONH2 ✔

Option A: Meta-phosphoric acid

Option B: Pyrophosphoric acid

Option C: No change in it

Option D: None of these

Correct Answer: Pyrophosphoric acid ✔

Option A: Stems & leaves during early stage of plant growth

Option B: Starches of potatoes & grains

Option C: Sugar of fruits & vegetables

Option D: Fibrous materials of plants

Correct Answer: Stems & leaves during early stage of plant growth ✔

Option A: Mono-calcium phosphate

Option B: Di-calcium phosphate

Option C: Fluorspar

Option D: None of these

Correct Answer: Di-calcium phosphate ✔

Option A: 13% N2 and 43% P2O5

Option B: 43% N2 and 13% P2O5

Option C: 43% N2 and 13% K2O

Option D: 43% K2O and 43% P2O5

Correct Answer: 13% N2 and 43% P2O5 ✔

Option A: N2

Option B: KNO3

Option C: NO2

Option D: NHO3

Correct Answer: N2 ✔

Option A: Rate of reaction is very low

Option B: Very high pressure is required resulting in costly pressure vessel

Option C: Space velocity of gas is very low resulting in decreased conversion

Option D: None of these

Correct Answer: Rate of reaction is very low ✔

Option A: 25-28

Option B: 52-54

Option C: 75-80

Option D: > 98

Correct Answer: 52-54 ✔

Option A: Haber’s

Option B: Stengel

Option C: Le-chatelier’s

Option D: Du-pont’s

Correct Answer: Stengel ✔

Option A: CaF2.3Ca3(PO4)2

Option B: 3Ca3(PO4)2

Option C: Ca(PO3)2

Option D: Ca(H2PO4)2

Correct Answer: CaF2.3Ca3(PO4)2 ✔

Option A: Catalytic

Option B: Endothermic

Option C: Exothermic

Option D: Autocatalytic

Correct Answer: Exothermic ✔

Option A: Phosphoric acid

Option B: Superphosphate

Option C: Triple superphosphate

Option D: Gypsum

Correct Answer: Phosphoric acid ✔

Option A: Ortho-phosphoric acid

Option B: Superphosphate

Option C: White phosphorous

Option D: None of these

Correct Answer: Ortho-phosphoric acid ✔

Option A: Nitrogenous

Option B: Phosphatic

Option C: Complex

Option D: Mixed

Correct Answer: Mixed ✔

Option A: Calcium nitrate

Option B: Ammonium nitrate

Option C: Calcium ammonium nitrate (CAN)

Option D: None of these

Correct Answer: Calcium ammonium nitrate (CAN) ✔

Option A: Pyro

Option B: Ortho

Option C: Meta

Option D: None of these

Correct Answer: Ortho ✔

Option A: Platinum-beryllium

Option B: Platinum-rhodium

Option C: Cobalt-molybdenum

Option D: Platinum-molybdenum

Correct Answer: Platinum-rhodium ✔

Option A: Urea

Option B: CAN

Option C: Ammonium sulphate

Option D: Superphosphate

Correct Answer: Ammonium sulphate ✔

Option A: Biuret

Option B: Ammonium carbamate

Option C: Ammonium carbonate

Option D: None of these

Correct Answer: Ammonium carbamate ✔

Option A: Reduced iron oxide

Option B: Nickel

Option C: Vanadium pentoxide

Option D: Silica gel

Correct Answer: Reduced iron oxide ✔

Option A: 10

Option B: 30

Option C: 50

Option D: 70

Correct Answer: 30 ✔

Option A: Mono-ethanolamine (MEA)

Option B: Slaked lime

Option C: Ammoniacal liquor

Option D: Methyl-Ethyl Ketone (MEK)

Correct Answer: Mono-ethanolamine (MEA) ✔

Option A: H2

Option B: O2

Option C: CO2

Option D: N2

Correct Answer: H2 ✔

Option A: Osmotic pressure of the soil water becomes less than that of the plant sap

Option B: Soil becomes too alkaline

Option C: Osmotic pressure of the soil water becomes higher than that of the plant sap

Option D: Soil becomes too acidic

Correct Answer: Osmotic pressure of the soil water becomes higher than that of the plant sap ✔

Option A: Increases the yield of urea

Option B: Adversely affects the yield of urea

Option C: Reduces the evaporator load by diluting the urea solution

Option D: Does not affect the yield of urea

Correct Answer: Adversely affects the yield of urea ✔

Option A: Use coal for heating purpose

Option B: Gasify coal to get hydrogen from coal gas

Option C: Use coal as filler in fertiliser

Option D: Use coal as conditioner in fertiliser

Correct Answer: Gasify coal to get hydrogen from coal gas ✔

Option A: 120°C and 300 atm

Option B: 190°C and 200 atm

Option C: 400°C and 550 atm

Option D: 200°C and 10 atm

Correct Answer: 190°C and 200 atm ✔

Option A: Ammonium carbonate

Option B: Biuret

Option C: Carbon dioxide

Option D: Ammonium carbamate

Correct Answer: Biuret ✔

Option A: Potassium sulphate

Option B: Potassium chloride

Option C: A mixture of NaCl + KCl

Option D: None of these

Correct Answer: Potassium sulphate ✔

Option A: Low bulk density product

Option B: Biuret formation

Option C: Non-spherical prills

Option D: Substantially wet non-flowing and sticky product

Correct Answer: Biuret formation ✔

Option A: Nitrogen

Option B: Phosphorous

Option C: Potassium

Option D: Calcium

Correct Answer: Phosphorous ✔

Option A: Presence of an inert atmosphere

Option B: Presence of a reducing atmosphere

Option C: Absence of air

Option D: Presence of an oxidising atmosphere

Correct Answer: Absence of air ✔

Option A: 3-4

Option B: 8-10

Option C: 15-17

Option D: 20-25

Correct Answer: 3-4 ✔

Option A: Superphosphate

Option B: Triple superphosphate

Option C: Calcium phosphate

Option D: Meta phosphoric acid

Correct Answer: Triple superphosphate ✔

Option A: 2

Option B: 6

Option C: 13

Option D: 20

Correct Answer: 6 ✔

Option A: 200 atm, 1000°C

Option B: 450 atm, 200°C

Option C: 450 atm, 550°C

Option D: 450 atm, 1000°C

Correct Answer: 450 atm, 550°C ✔

Option A: CO2 and N2

Option B: CO2, H2 and N2

Option C: NH3 and CO

Option D: HNO3 and CaCO3

Correct Answer: CO2, H2 and N2 ✔

Option A: Catalytic

Option B: Exothermic

Option C: Endothermic

Option D: Reversible

Correct Answer: Exothermic ✔

Option A: 250-300

Option B: 500-750

Option C: 950-1050

Option D: 1400-1450

Correct Answer: 1400-1450 ✔

Option A: Dicalcium phosphate

Option B: Superphosphate

Option C: Triple superphosphate

Option D: None of these

Correct Answer: Superphosphate ✔

Option A: Superphosphate

Option B: Triple superphosphate

Option C: Meta-phosphoric acid

Option D: Monoammonium phosphate

Correct Answer: Triple superphosphate ✔

Option A: Corrosive in nature

Option B: Toxic and harmful to some crops

Option C: Helpful in decomposition of urea

Option D: Explosive in nature

Correct Answer: Toxic and harmful to some crops ✔

Option A: Nature of soil

Option B: Type of crop

Option C: pH of soil

Option D: None of these

Correct Answer: None of these ✔

Option A: Ammonium sulphate

Option B: Nitro-phosphate

Option C: Superphosphate

Option D: Potassium nitrate

Correct Answer: Ammonium sulphate ✔

Option A: Superphosphate

Option B: Triple superphosphate

Option C: Nitrophosphate

Option D: Diammonium phosphate

Correct Answer: Triple superphosphate ✔

Option A: 700 – 1000

Option B: 300 – 450

Option C: 1500-1700

Option D: 100-200

Correct Answer: A. 700 – 1000 ✔

Option A: Nitrate nitrogen is quick acting

Option B: Ammoniacal nitrogen is quick acting

Option C: Nitrate nitrogen is slower acting

Option D: None of these

Correct Answer: Nitrate nitrogen is quick acting ✔

Option A: Co-Mo

Option B: Pt-Rh

Option C: Silica gel

Option D: Nickel

Correct Answer: Co-Mo ✔

Option A: 1.5 : 1

Option B: 3.5 : 1

Option C: 10 : 1

Option D: 15 : 1

Correct Answer: 3.5 : 1 ✔

Option A: High pressure, low reactants concentration, high temperature

Option B: High pressure, low reactants concentration, low temperature

Option C: High pressure, high reactants concentration, low temperature

Option D: Low pressure, high reactants concentration, low temperature

Correct Answer: High pressure, high reactants concentration, low temperature ✔

Option A: Calcium

Option B: Magnesium

Option C: Sulphur

Option D: Oxygen

Correct Answer: Oxygen ✔

Option A: Urea

Option B: Calcium ammonium nitrate

Option C: Superphosphate

Option D: Ammonium sulphate

Correct Answer: Urea ✔

Option A: 4

Option B: 22

Option C: 58

Option D: 84

Correct Answer: 58 ✔

Option A: Nitrogenous fertiliser

Option B: Potassic fertiliser

Option C: Phosphatic fertiliser

Option D: None of these

Correct Answer: Nitrogenous fertiliser ✔

Option A: The highest concentration nitrogenous fertiliser

Option B: The best fertiliser for paddy

Option C: A basic fertiliser

Option D: A neutral fertiliser

Correct Answer: The best fertiliser for paddy ✔

Option A: Nitric acid

Option B: Ammonia

Option C: Ammonium nitrate

Option D: Nitric oxide

Correct Answer: Ammonia ✔

Option A: Maharashtra and Gujarat

Option B: Maharashtra and Orissa

Option C: Gujarat and Madhya Pradesh

Option D: Jharkhand and Chhattisgarh

Correct Answer: Maharashtra and Gujarat ✔

Option A: 1-2

Option B: 15-25

Option C: 40-45

Option D: 60-65

Correct Answer: 15-25 ✔