chemical engineering MCQs – Page 381

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

7601. _____________ is the undesirable by-product produced in the manufacture of urea ?
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A. Ammonium carbonate

B. Carbon dioxide

C. Biuret

D. Ammonium carbamate

7602. _____________ is not a fertiliser?
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A. Ferrous sulphate

B. Calcium ammonium nitrate

C. Liquid ammonia

D. Ammonium sulphate

7603. Montecatini process is a widely used process for the manufacture of ___________________?
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A. Urea

B. Triple superphosphate

C. Calcium ammonium nitrate

D. None of these

7604. Triple superphosphate is made by reacting phosphate rock with _____________ acid?
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A. Hydrochloric

B. Nitric

C. Sulphuric

D. Phosphoric

7605. Ammonia synthesis gas is produced from fuel oil by _________________?
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A. Hydro-cracking

B. Steam reforming

C. Partial oxidation

D. Hydrogenation

7606. Multistage operation (as in the case of catalytic oxidation of SO2) is not carried out for NH3 synthesis, because of____________________?
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A. Higher pumping cost

B. High cost of the high pressure vessel used for the reactor

C. Chances of entrainment and disturbance of catalyst bed

D. Comparatively higher pressure drop

7607. Liquid ammonia and 60% nitric acid reaction (which produces ammonium nitrate) is___________________?
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A. Exothermic

B. Endothermic

C. None of these

D. Autocatalytic

7608. -10-5 fertilisers mean that they contain______________?
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A. Only 5 to 10% active fertiliser constituents

B. 5, 10, 5% respectively of N2, P2O5 and K2O

7609. Salt content in sea water is about ______________ percent?
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A. 9.05

B. 1

C. 0.5

D. 3.5

7610. Which of the following gasifiers can be attached to coal based fertiliser plants ?
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A. Gasifier working at 20 atm

B. Gasifier working at 40 atm

C. Kopper-Totzek gasifier

D. Lurgi (high pressure) gasifier

7611. The upper layer of atmosphere is called the ____________________?
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A. Ionosphere

B. Troposphere

C. Stratosphere

D. None of these

7612. Which is the most suitable fertiliser for paddy ?
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A. Ammonium nitrate

B. CAN

C. Superphosphate

D. Ammonium sulphate

7613. Fertiliser produced during soda ash manufacture by dual process is ammonium______________________?
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A. Nitrate

B. Sulphate

C. Chloride

D. None of these

7614. Dehydration of ammonium carbamate produces__________________?
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A. Biuret

B. Ammonia water

C. Urea

D. None of these

7615. Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550C), because at low temperature___________________?
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A. Very high pressure is required resulting in costly pressure vessel

B. Space velocity of gas is very low resulting in decreased conversion

C. None of these

D. Rate of reaction is very low

7616. In water treatment plant, zeolite process is used to remove the _____________ of water?
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A. Iron & zinc

B. Alkalinity

C. Hardness

D. Acidity

7617. Nitrogen content in ammonium sulphate (a fertiliser) is around ______________ percent?
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A. 50

B. 20

C. 65

D. 5

7618. P2O5 percentage in the phosphoric acid produced by wet process is about_________________?
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A. 70

B. 30

C. 50

D. 10

7619. Superphosphate is manufactured by reacting phosphate rock with_____________________?
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A. Aluminium chloride

B. None of these

C. Sulphuric acid

D. Acetic acid

7620. Reaction of ortho-phosphoric acid with phosphate rock produces _________________?
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A. Meta-phosphoric acid

B. Superphosphate

C. Triple superphosphate

D. Monoammonium phosphate

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