Chemical Engineering MCQs

Page No. 741

Digestion of wood-base materials (for manufacture of pulp) is done to __________________?


aRemove lignin

✓


bProduce long fibres

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cPrevent deterioration on storage

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dNone of these

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View Answer Remove lignin

Antibiotic____________________?


aInhibits/destroys the growth of microorganisms

✓


bIs used as a pain reliever

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cIs an antimalarial

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dIs an anaesthetic

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Linde process of gas liquefaction employs__________________?


aExchange of heat with colder stream

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bAdiabatic expansion through a throttle valve (Joule-Thomson expansion)

✓


cAdiabatic expansion against a piston or in a turbine

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dMerely compressing the gas beyond its critical pressure

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Chemical formula of ‘salt cake’ is____________________?


aNa2SO4

✓


bCaSO4

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cMgSO4

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dBaSO4

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View Answer Na2SO4

In Kraft process of paper manufacture, white cooking liquor consists of caustic soda________________?


aSodium sulphide & sodium carbonate

✓


bSodium sulphite & sodium carbonate

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cSodium sulphite & sodium sulphide

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dNone of these

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Enzymes are_________________?


aProteins with high molecular weight (around 10,000)

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bDerived from living organisms

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cCatalyst for temperature sensitive reactions

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dAll A, B. and C.

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View Answer All A, B. and C.

Catalyst used during the manufacture of ‘Vanaspati Ghee’ is ___________________?


aZinc

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bNickel

✓


cPlatinum

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dCopper

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View Answer Nickel

Naphthalene is removed from coke oven gas by ________________________?


aAdsorbing on palladium

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bAbsorbing in ethanolamine

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cScrubbing with wash oil

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dPassing it through electrostatic precipitator

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Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of ____________________?


aNitric acid

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bSulphuric acid

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cAmmonium sulphate

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dHydrochloric acid

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View Answer Sulphuric acid

Which of the following is an ore of iron ?


aGalena

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bChalcopyrite

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cHematite

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dBauxite

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View Answer Hematite

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