Chemical Engineering MCQs

Page No. 741

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


aRemove lignin


bProduce long fibres


cPrevent deterioration on storage


dNone of these


View Answer Remove lignin

Antibiotic____________________?


aInhibits/destroys the growth of microorganisms


bIs used as a pain reliever


cIs an antimalarial


dIs an anaesthetic



Linde process of gas liquefaction employs__________________?


aExchange of heat with colder stream


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


cAdiabatic expansion against a piston or in a turbine


dMerely compressing the gas beyond its critical pressure



Chemical formula of ‘salt cake’ is____________________?


aNa2SO4


bCaSO4


cMgSO4


dBaSO4


View Answer Na2SO4

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


aSodium sulphide & sodium carbonate


bSodium sulphite & sodium carbonate


cSodium sulphite & sodium sulphide


dNone of these



Enzymes are_________________?


aProteins with high molecular weight (around 10,000)


bDerived from living organisms


cCatalyst for temperature sensitive reactions


dAll A, B. and C.


View Answer All A, B. and C.

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


aZinc


bNickel


cPlatinum


dCopper


View Answer Nickel

Naphthalene is removed from coke oven gas by ________________________?


aAdsorbing on palladium


bAbsorbing in ethanolamine


cScrubbing with wash oil


dPassing it through electrostatic precipitator



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


aNitric acid


bSulphuric acid


cAmmonium sulphate


dHydrochloric acid


View Answer Sulphuric acid

Which of the following is an ore of iron ?


aGalena


bChalcopyrite


cHematite


dBauxite


View Answer Hematite

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