Chemical Engineering MCQs

Page No. 699

Liquefaction of gases cannot be done by___________________?


aExchange of heat with colder stream


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


cMerely compressing it beyond critical pressure


dAdiabatic expansion against a piston or in a turbine



Cumene is the starting material for the production of________________?


aBenzoic acid


bPhenol and acetone


cIsoprene


dStyrene


View Answer Phenol and acetone

Margarine is a/an____________________?


aFat


bExplosive


cPlasticiser


dRocket propellant


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


bGypsum


cCalcium silicate


dCalcium sulphate


View Answer Gypsum

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


aRosin


bBorax


cBenzyl acetate


dSodium carbonate


View Answer Borax

Glauber’s salt is chemically represented by____________________?


aNa2SO4.10H2O


bCaCl(OCl)


cCaSO4.H2O


d(NH4)2SO4


View Answer Na2SO4.10H2O

Main constituents of Portland cement are calcium aluminate and__________________?


aGypsum


bSilicates


cSodium silicate


dCarbonates


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


cFacilitate easy regeneration of zeolite


dAll A , B. and C.



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


aBrine


bChloramines


cSodium bisulphite


dLiquid chlorines


View Answer Brine

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