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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