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Polymers Test - 6

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Polymers Test - 6
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  • Question 1
    1 / -0

    Identify the type of polymer: —A—A—A—A—A—A—

    Solution

    Since only one monomeric unit is present. So, it is a homopolymer.

  • Question 2
    1 / -0

    Identify the type of polymer: —A—B—B—A—A—A—B—A—

    Solution

    This is copolymer which is a polymer made up of different monomeric units.

  • Question 3
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    Which of the following polymers can have strong intermolecular forces?

    Solution

    Nylon and polyesters are fibres and have strong intermolecular forces. Fibres are the thread forming solids which possess high tensile strength and high modulus. These characteristics can be attributed to the strong intermolecular forces like hydrogen bonding.

  • Question 4
    1 / -0

    In which of the following polymers ethylene glycol is one of the monomer units?

    Solution

    Formation of dacron (or terylene) requires ethylene glycol and terephthalic acid as monomer unit. The mixture of ethylene glycol and terephthalic acid is heated at 420 to 460 K in the presence of zinc acetate-antimony trioxide catalyst to give dacron.

  • Question 5
    1 / -0

    Which of the following statements is not true about low density polythene?

    Solution

    Low density polythene is chemically inert and tough but flexible and a poor conductor of electricity. It has highly branched structure. Hence, it is used in the insulation of electricity carrying wires.

  • Question 6
    1 / -0

    The commercial name of polyacrylonitrile is ______________.

    Solution

    Polyacrylonitrile is used as a substitute for wool in making commercial fibres as orlon or acrilan.

  • Question 7
    1 / -0

    Dacron is manufactured from ethylene glycol and terephthalic acid with one of the conditions given below:

    Solution

    Dacron is manufactured by heating a mixture of ethylene glycol and terephthalic acid at 420 to 460K in presence of Zn(CH3COO)2-SnO3 as catalyst.

  • Question 8
    1 / -0

    Natural rubber is

    Solution

    Natural rubber maybe considered as a linear polymer of isoprene (2-methyl-1, 3-butadiene) and is also called as cis - 1, 4 polyisoprene.

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