Multiple Choice Questions

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'Terylene is not a

  • copolymer

  • polyester fibre

  • chain growth polymer

  • step growth polymer


C.

chain growth polymer

Terylene is a copolymer of terephthalic acid and ethylene glycol. It is a polyester fibre.

Since, it is a product of condensation polymerisation, in which molecular mass of polymer is not a whole number of monomer (due to loss of H2O molecules), so it is also called step growth polymer.


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Which of the following is not a biodegradable polymer?

  • Glyptol

  • Polyhydroxy butyrate-CO-β-hyrdoxy valerate

  • PHBV

  • Nylon 2-nylon-6


A polymer containing nitrogen is :

  • bakelite

  • dacron

  • rubber

  • nylon-66


The monomers of buna-S rubber are

  • vinyl chloride and sulphur

  • butadiene

  • styrene and butadiene

  • isoprene and butadiene


Orlon has monomeric unit

  • acrolein

  • glycol

  • Vinyl cyanide

  • Isoprene


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In Buna-S, the symbol Bu stands for

  • 1-butene

  • n-butene

  • 2-butene

  • butadiene


Which of the following is not true?

  • In vulcanisation, the rubber becomes harder and stronger

  • Natural rubber has 'trans' configuration at every double bond

  • Buna-S is a copolymer of butene and styrene

  • Natural rubber is 1, 4-polymer of isoprene


Three dimensional molecules with cross links are formed in the case of a

  • thermoplastic

  • thermosetting plastic

  • Both (a) and (b)

  • None of the above


The condensation polymer among the following is

  • rubber

  • protein

  • PVC

  • polythene


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Which of the following is a polyamide?

  • Nylon-6, 6

  • Terylene

  • Polythene

  • Buna - S


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