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Railways NTPC (Technical Ability) Materials Science Question Bank Materials Science

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    The molecular weight of vinyl chloride is 62.5 Thus the molecular weight of a polyvinyl chloride with a degree of polymerisation of 20000 is:

    A) \[\frac{20000}{62.5}\]               

    B) \[\frac{62.5}{20000}\]

    C) \[62.5\times 20000\]       

    D) 20000

    Correct Answer: C

    Solution :

    Molecular weight, \[{{M}_{n}}=\]Molecular weight of repeating unit, \[{{M}_{0}}\times \]average degree of polymerization, \[x=62.5\times 20000\]


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