Chemical Engineering MCQs

Page No. 339

Neoprene is chemically known as _________________?


aPolybutadiene


bStyrene butadiene rubber (SBR)


cPolyurethane


dPoly chloroprene


View Answer Poly chloroprene

Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its__________________?


aTensile strength


bChemical resistance


cFlexibility


dAll A., B. & C.


View Answer Flexibility

Which of the following is generally not used as eord for synthetic rubber tyre casing ?


aDacron


bNylon


cCellulose


dNone of these


View Answer Cellulose

Which of the following is not present in bagasse fiber?


aCellulose


bLignin


cPentogens


dNone of these


View Answer None of these

Dacron is a/an ___________________?


aPolyester


bUnsaturated polyester


cPolyamide


dInorganic polymer


View Answer Polyester

Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E. (poly chloro tetra fluoro ethylene). It is also called ________________?


aPolyurethane


bSilicone rubber


cTeflon


dEpoxy resin


View Answer Teflon

Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of________________?


aCold SBR


bButyl rubber


cBunai N


dBuna S


View Answer Butyl rubber

Ebonite is a/an___________________?


aHighly vulcanised rubber


bNatural rubber


cUnvulcanised raw rubber


dAdhesive



90% of the caprolactam is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of _____________ °C?


a-5


b10-30


c250-280


d500-600


View Answer 250-280

Flexible plastic pipes are made of___________________?


aHigh density polyethylene (HDPE)


bLow density polyethylene (LDPE)


cPolypropylene


dUnsaturated polyester



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