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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

Hydrogen content of coke oven gas is __________ percent.

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

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Question 2

Urea is formed only

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

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Question 3

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

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

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Question 4

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

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

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Question 5

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

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Question 6

Superphosphate is manufactured by reacting phosphate rock with

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

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Question 7

Vetrocoke solution is

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

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Question 8

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

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Question 9

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.

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Question 10

Ammonium sulphate can be produced by reacting gypsum with

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

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Question 11

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.

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Question 12

Prilling tower is found in the flowsheet for the manufacture of

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

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Question 13

Phosphorus vapour comprises of

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

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Question 14

Reaction of orthophosphoric acid with soda ash produces

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

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Question 15

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

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

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Question 16

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.

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Question 17

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

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Question 18

Reaction of dilute sulphuric acid with phosphate rock produces

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

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Question 19

Urea is represented as

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

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Question 20

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.

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Question 21

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

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

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Question 22

P2O5 content in triple superphosphate is about __________ percent.

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

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Question 23

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.

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Question 24

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

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Question 25

Catalyst used in Haber's process for ammonia production is

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

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Question 26

Heating of orthophosphoric acid to 250°C produces

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

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Question 27

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

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

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Question 28

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

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

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Question 29

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

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Question 30

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)

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Question 31

Which is the most suitable fertiliser for paddy ?

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

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Question 32

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.

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Question 33

Ammonium sulphate fertiliser is

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

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Question 34

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.

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Question 35

Action of phosphoric acid on rock phosphate produces

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

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Question 36

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

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Question 37

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.

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Question 38

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.

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Question 39

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.

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Question 40

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

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Question 41

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.

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Question 42

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

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Question 43

Ammonia synthesis gas is produced from natural gas by

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

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Question 44

Phosphoric acid is produced in wet process from phosphate rock and

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

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Question 45

Urea is a __________ fertiliser.

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

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Question 46

Commercial fertilisers are available mostly in the form of

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

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Question 47

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

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Question 48

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.)

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Question 49

H3PO4 is the chemical formula of __________ phosphoric acid.

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

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