Chemical Engineering MCQs

Page No. 333

Polycondensation reaction of polymerisation ___________________?


aDoes not produce linear polymers


bProduces only thermoplastic material


cProduces epoxy polymers


dDoes not need any catalyst



In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is________________?


aTerylene


bPolybutadiene


cPVC


dPolypropylene


View Answer Terylene

In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer ?


aPTFE


bBuna-S


cPMMA


dPolycaprolactam


View Answer Buna-S

Properties of a polymer is affected by the____________________?


aChain length


bIntermolecular forces


cBoth A. and B.


dNone of these


View Answer Both A. and B.

Nylon-66 is manufactured from ____________________?


aAdipic acid and Hexamethylene diamine


bCaprolactam


cMaleic anhydride and Hexamethylene diamine


dDimethyl terephthalate (DMT) and ethylene glycol



Poly-tetra-fluoro ethylene (PTFE) is known as_________________?


aDacron


bTeflon


cBakelite


dBakelite


View Answer Teflon

Density of low density polythene is about ____________ gm/c.c?


a0.38


b0.56


c0.81


d0.91


View Answer 0.91

Condensation polymerisation of caprolactam is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6?


a-20 to 25


b50 to 75


c100 to 150


d250-280


View Answer 250-280

Scouring is a finishing operation during the manufacture of fibre, which aims at ______________ of fibres?


aImproving the stretchability


bDyeing/colouring


cDetergent solution washing


dGlycol soaking



In condensation polymerisation as compared to addition polymerisation____________________?


aThe monomers are unsaturated compounds


bNo co-product is lost


cThe monomers contain two functional groups


dGenerally only one monomer is involved



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