chemical engineering MCQs – Page 380

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 Review each marked answer and report any item that may be outdated or unclear.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

7581. Regenerators are normally provided in the____________________?
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A. All A., B. and C.

B. Glass melting furnace

C. Open hearth furnace

D. By product coke ovens

7582. Which of the following nitrogenous fertilisers has the highest percentage of nitrogen ?
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A. Ammonium sulphate

B. Calcium nitrate

C. Calcium ammonium nitrate (CAN)

D. Urea

7583. Red phosphorous is changed into white phosphorous by______________________?
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A. Melting under pressure

B. None of these

C. Vaporisation followed by condensation

D. Heating in presence of light

7584. Disinfection of water is done to remove ______________________?
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A. Foul odour

B. Color

C. Bad taste

D. Bacteria

7585. Pick out the wrong statement ?
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A. called its flash point</strong>

B. Maximum yield of naphthalene is obtained on distillation of crude oil

C. als

D. Each ton of petroleum oil on distillation produces about 30-50 Nm3 of gas

E. LPG is also used as fuel for automobiles & small furnaces and for cutting & welding of

F. The minimum temperature, at which a petroleum oil vapor catches fire and continues to burn,

7586. Commercial fertilisers are available mostly in the form of__________________?
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A. Powder

B. Flakes

C. Granules

D. Lumps

7587. Urea is formed only____________________?
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A. At very low pressure (vacuum)

B. In liquid phase

C. In vapour phase

D. At very high temperature

7588. Effectiveness of a fertiliser is independent of the ___________________?
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A. Type of crop

B. None of these

C. pH of soil

D. Nature of soil

7589. Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in gas chamber is about ______________ ppm?
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A. < 1

B. 10-100

C. 100-1000

D. 100-200

7590. Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of_________________?
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A. Phosphorous

B. Triple superphosphate

C. Phosphoric acid

D. Superphosphate

7591. Flushing liquor used for cooling coke oven gas constitutes of __________________?
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A. Dilute H2SO4

B. Dilute HCl

C. Ammoniacal liquor

D. K2CO3 solution

7592. Prilling tower is found in the flowsheet for the manufacture of__________________?
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A. Urea

B. Ammonia

C. Superphosphate

D. Triple superphosphate

7593. Commercial production of hydrogen for the manufacture of nitrogenous fertilisers is done by________________?
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A. Steam reforming of naphtha and cracking of natural gas

B. All A., B. and C.

C. Cryogenic separation of hydrogen from coke oven gas

D. Electrolysis of water

7594. Maximum stability of white phosphorous is at__________________?
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A. Atmospheric pressure

B. Room temperature

C. > 600C

D. Very high pressure

7595. Which of the following is the most active zone of atmosphere in which weathering events like rain, storm & lightning occur ?
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A. Stratosphere

B. Troposphere

C. Thermosphere

D. None of these

7596. Promoter used in NH3 synthesis catalyst is__________________?
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A. K2O

B. SiO3

C. U2O3

D. V2O5

7597. The essential ingredient of all the synthesis gas is___________________?
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A. H2

B. CO2

C. O2

D. N2

7598. Main component of bone ash is _________________?
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A. Calcium phosphate

B. Calcium carbonate

C. Sodium phosphate

D. Calcium sulphate

7599. A mixture of phosphate rock ______________ is heated in an electric furnace to produce phosphorous?
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A. Salt & coke

B. And coke

C. Sand & coke

D. And sand

7600. Vapor phase reaction of ammonia & nitric acid to produce ammonium nitrate is termed as the _______________ process?
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A. Habers

B. Stengel

C. Du-ponts

D. Le-chateliers

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