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Polymers Test - 10

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Polymers Test - 10
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Weekly Quiz Competition
  • Question 1
    1 / -0

    Which among the following polymers is chemically least reactive and thermally most stable?

    Solution

    Teflon is chemically unreactive and thermally stable.

     

  • Question 2
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    Caprolactum is obtained by Beckmann rearrangement of

    Solution

    Caprolactum is obtained by Beckmann rearrangement of cyclohexanone oxime.

     

  • Question 3
    1 / -0

    Which of the following is used in paints?

    Solution

    Glyptal is a polymer which is used in the manufacture of paints and lacquers.

     

  • Question 4
    1 / -0

    What percentage of sulphur is used in the vulcanisation of rubber?

    Solution

    Natural rubber becomes soft at high temperatures (> 335 K) and brittle at low temperatures (< 283 K), and shows high water absorption capacity. On vulcanisation, sulphur forms cross links at the reactive sites of double bonds and thus, the rubber gets stiffened. In the manufacture of tyre rubber, 5% of sulphur is used as a cross-linking agent.

     

  • Question 5
    1 / -0

    Which of the following is a biodegradable polymer of polyester class?

    Solution

    PHBV is biodegradable and contains ester linkages.

     

  • Question 6
    1 / -0

    The outer capsule of drugs is made up of a polymer of

    Solution

    3-hydroxybutanoic acid and 3-hydroxypentanoic acid, on copolymerisation, form PHBV polymer which is a biodegradable polymer and is used in speciality packaging, orthopaedic devices and for the controlled release of drugs.

     

  • Question 7
    1 / -0

    The polymer which is used in army weapons is

    Solution

    The polymer which is used in army weapons is urea-formaldehyde resin.

     

  • Question 8
    1 / -0

    The polymer which is used in army weapons is urea-formaldehyde resin.

    Solution

    The polymer used for making contact lenses for eyes is polymethylmethacrylate.

     

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