Chemical Engineering MCQs

Page No. 723

Portland cement consists mainly of__________________?


aCaO & SiO2


bSiO2 & Al2O3


cCaO & Al2O3


dCaO & Fe2O3


View Answer CaO & SiO2

Fluorescent dyes are added in detergents to__________________?


aAct as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics


bAttain distinctiveness from other brands


cAct as tarnish inhibitor for metals like German silver


dNone of these



Main constituents of natural rubber is____________________?


aPolystyrene


bPolyisoprene


cPolybutadiene


dPolychlorophrene


View Answer Polyisoprene

Which of the following is not required in the manufacture of soda ash by Solvay process ?


aAmmonia


bLimestone


cNitric acid


dNone of these


View Answer Nitric acid

Deacon’s method is used for the manufacture of____________________?


aGlauber’s salt


bCommon salt


cChlorine


dGraphite electrode


View Answer Chlorine

Varnish does not contain_______________?


aThinner


bPigment


cBoth A. & B.


dNeither A. nor B.


View Answer Pigment

Ethyl alcohol cannot be produced_________________?


aFrom waste sulphite substrate of paper mills


bBy Esterification and hydrolysis of ethylene


cFrom molasses


dNone of these


View Answer None of these

Which of the following sugars is the sweetest ?


aGlucose


bFructose


cSucrose


dLactose


View Answer Fructose

Temporary hardness of water can be removed by__________________?


aAddition of alum (a coagulant)


bBoiling


cFiltration (through gravity sand filter)


dAddition of lime


View Answer Boiling

Epoxy resin__________________?


aIs a good adhesive


bIs an elastomer


cCannot be used for surface coatings


dIs a polyester


View Answer Is a good adhesive

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