Chemical Engineering MCQs

Page No. 339

Neoprene is chemically known as _________________?


aPolybutadiene

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bStyrene butadiene rubber (SBR)

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cPolyurethane

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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

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bChemical resistance

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cFlexibility

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dAll A., B. & C.

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View Answer Flexibility

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


aDacron

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bNylon

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cCellulose

✓


dNone of these

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View Answer Cellulose

Which of the following is not present in bagasse fiber?


aCellulose

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bLignin

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cPentogens

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dNone of these

✓


View Answer None of these

Dacron is a/an ___________________?


aPolyester

✓


bUnsaturated polyester

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cPolyamide

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dInorganic polymer

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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

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bSilicone rubber

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cTeflon

✓


dEpoxy resin

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View Answer Teflon

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


aCold SBR

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bButyl rubber

✓


cBunai N

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dBuna S

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View Answer Butyl rubber

Ebonite is a/an___________________?


aHighly vulcanised rubber

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bNatural rubber

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cUnvulcanised raw rubber

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dAdhesive

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


a-5

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b10-30

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c250-280

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d500-600

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View Answer 250-280

Flexible plastic pipes are made of___________________?


aHigh density polyethylene (HDPE)

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bLow density polyethylene (LDPE)

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cPolypropylene

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dUnsaturated polyester

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