Chemical Engineering MCQs

Page No. 699

Liquefaction of gases cannot be done by___________________?


aExchange of heat with colder stream

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

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cMerely compressing it beyond critical pressure

✓


dAdiabatic expansion against a piston or in a turbine

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Cumene is the starting material for the production of________________?


aBenzoic acid

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bPhenol and acetone

✓


cIsoprene

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dStyrene

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View Answer Phenol and acetone

Margarine is a/an____________________?


aFat

✓


bExplosive

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cPlasticiser

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dRocket propellant

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View Answer Fat

Bromine content in sea water may be around _________________ ppm?


a70

✓


b640

✖


c1875

✖


d1875

✖


View Answer 70

Heating of _______________ to 120°C, produces plaster of paris ?


aBlue vitriol

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bGypsum

✓


cCalcium silicate

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dCalcium sulphate

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View Answer Gypsum

Which of the following is used as a binding material in soap to improve soap texture ?


aRosin

✖


bBorax

✓


cBenzyl acetate

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dSodium carbonate

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View Answer Borax

Glauber’s salt is chemically represented by____________________?


aNa2SO4.10H2O

✓


bCaCl(OCl)

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cCaSO4.H2O

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d(NH4)2SO4

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View Answer Na2SO4.10H2O

Main constituents of Portland cement are calcium aluminate and__________________?


aGypsum

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bSilicates

✓


cSodium silicate

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dCarbonates

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View Answer Silicates

The purpose of adding Na2CO3 to water of low alkalinity is to__________________?


aPermit the use of alum as a coagulant

✓


bIncrease the softening capacity of zeolite

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cFacilitate easy regeneration of zeolite

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dAll A , B. and C.

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Zeolite used in water softening process (cation exchange) is regenerated by washing with___________________?


aBrine

✓


bChloramines

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cSodium bisulphite

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dLiquid chlorines

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View Answer Brine

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