Chemical Engineering MCQs

Page No. 331

Most of the fibre forming polymers are crystalline in nature, one of the exceptions being ______________ which is amorphous in nature?


aNylon


bPolyacrylonitrile


cPolypropylene


dPolyester


View Answer Polyacrylonitrile

Styrene which is a monomer for the production of polystyrene, is commercially produced by the __________________?


aCatalytic dehydrogenation of ethyl benzene


bDehydration of ethyl alcohol followed by hydrogenation


cReacting ethylene oxide with acetaldehyde


dFermentation of starch



_____________ polythene is most prone to stress-cracking ?


aHigh density


bLow density


cCross-linked


dLinear low density


View Answer High density

Polymers are_________________?


aMicro-molecules


bMacromolecules


cSub-micromolecules


dNone of these


View Answer Macromolecules

Thermosetting materials_________________?


aAre cross-linked molecules


bSoften on application of heat


cAre solvent soluble


dNone of these



Which of the following is not an elastomer ?


aPolyisoprene


bNeoprene


cNitrile-butadiene


dNone of these


View Answer None of these

Softening point of high density polythene is about ______________ °C?


a85


b135


c165


d205


View Answer 135

_______________________ is not a condensation polymer ?


aTeflon


bNylon-66


cDacron


dPolystyrene


View Answer Teflon

Styrene butadiene rubber is commercially manufactured by__________________?


aBulk polymerisation


bSuspension polymerisation


cSolution Solution polymerisation


dEmulsion polymerisation



Adipic acid is an intermediate in the manufacture of _____________________?


aPerspex


bNylon-66


cPolystyrene


dBakelite


View Answer Nylon-66

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