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Chemical Engineering :: Polymer Technology

  1. Pickout the wrong statement.

  2. A.
    Polymers made of only one monomer is called homopolymer.
    B.
    Polymers made of more than one monomer is called copolymer or mixed polymer.
    C.
    Vulcanised rubber is more elastic than natural rubber.
    D.
    The intermoleculer forces in ther-mosplastic polymers are intermediate to that of elastomers & fibres.

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  3. The only natural thermoplastic resin, which is a product of animal life is

  4. A.
    rosin
    B.
    shellac
    C.
    amber
    D.
    copal

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  5. Silicone is a/an

  6. A.
    monomer
    B.
    inorganic polymer
    C.
    thermoplastic material
    D.
    a natural polymer

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  7. Which of the following polymers are produced by employing all bulk polymerisation, solution polymerisation & suspension polymerisation technique of addition (chain) polymerisation ?

  8. A.
    PVC
    B.
    Bakelite
    C.
    PTFE
    D.
    Epoxy resin

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  9. Polymers are

  10. A.
    micromolecules
    B.
    macromolecules
    C.
    sub-micromolecules
    D.
    none of these

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  11. __________ practically possess no elasticity.

  12. A.
    Vulcanite or ebonite
    B.
    Spandex fibre
    C.
    Polysulphide rubber
    D.
    Epoxy resin

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  13. Phenol formaldehyde

  14. A.
    employs addition polymerisation.
    B.
    employs condensation polymerisation.
    C.
    is a monomer.
    D.
    is an abrasive material.

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  15. Polyesters are manufactured by the polycondensation reaction of

  16. A.
    dibasic acid with dihydric alcohol.
    B.
    a single monomer.
    C.
    carboxylic acid with ethylene.
    D.
    inorganic acid with ethylene glycol.

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  17. Thermosetting materials

  18. A.
    are cross-linked molecules.
    B.
    soften on application of heat.
    C.
    are solvent soluble.
    D.
    none of these.

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  19. A chain growth polymerisation reaction consists of three different types of reaction namely initiation reaction, propagation reaction & termination reaction. Chain growth polymerisation reaction is not involved in the manufacture of

  20. A.
    siloxane elastomers.
    B.
    polyamides.
    C.
    vinyl polymers.
    D.
    urea-formaldehyde resins.

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