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

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bPolyacrylonitrile

✓


cPolypropylene

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dPolyester

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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

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cReacting ethylene oxide with acetaldehyde

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dFermentation of starch

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_____________ polythene is most prone to stress-cracking ?


aHigh density

✓


bLow density

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cCross-linked

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dLinear low density

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View Answer High density

Polymers are_________________?


aMicro-molecules

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bMacromolecules

✓


cSub-micromolecules

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dNone of these

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View Answer Macromolecules

Thermosetting materials_________________?


aAre cross-linked molecules

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bSoften on application of heat

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cAre solvent soluble

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dNone of these

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Which of the following is not an elastomer ?


aPolyisoprene

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bNeoprene

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cNitrile-butadiene

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dNone of these

✓


View Answer None of these

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


a85

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b135

✓


c165

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d205

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View Answer 135

_______________________ is not a condensation polymer ?


aTeflon

✓


bNylon-66

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cDacron

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dPolystyrene

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View Answer Teflon

Styrene butadiene rubber is commercially manufactured by__________________?


aBulk polymerisation

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bSuspension polymerisation

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cSolution Solution polymerisation

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dEmulsion polymerisation

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Adipic acid is an intermediate in the manufacture of _____________________?


aPerspex

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bNylon-66

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cPolystyrene

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dBakelite

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View Answer Nylon-66

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