Chemical Engineering MCQs

Page No. 340

Buna-S is also known as_________________?


aTeflon


bPTFE


cSBR


dPolycrylates


View Answer SBR

Synthetic polymer produced by using terephthalic acid and ethylene glycol is _________________?


aTerylene


bNylon-66


cPVC


dPolystyrene


View Answer Terylene

Which of the following polymers has the tendency of decomposing before melting ?


aPolystyrene


bNylon


cPVC


dNone of these


View Answer PVC

Which of the following polymers is used for making a non stick coating on frying pans ?


aBakelite


bTeflon


cPerspex


dPVC


View Answer Teflon

The organic acid monomer in nylon-66 is __________________?


aSebacic acid


bTerephthalic acid


cAdipic acid


dBenzoic acid


View Answer Adipic acid

Non sulphonated hard bakelites are not used for making _______________________?


aIon-exchange resins


bFountain pen barrels


cFormica table tops


dCombs


View Answer Ion-exchange resins

Density of high density polythene is about __________ gm/c.c ?


a1.18


b1.05


c0.95


d0.99


View Answer 0.95

Bakelite is a/an ______________________?


aAddition polymer


bElastomer


cThermoplastic


dNone of these


View Answer None of these

Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of _______________ percent?


a1-1000


b1000-1500


c1500-2000


d2000-2500


View Answer 1-1000

Addition polymerisation takes place either by a free radical mechanism or ionic mechanism depending on the reagents used. Free radical polymerisation is catalyzed by _______________, which decompose to give free radicals?


aOrganic peroxides


bSulphuric acid


cHydrofluoric acid


dNone of these


View Answer Organic peroxides

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