CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2005

  • question_answer
    The number average molecular mass and mass average molecular mass of a polymer are respectively 30,000 and 40, 000. The poly dispersity index of the polymer is:

    A) < 1                         

    B)        > 1

    C) 1                             

    D)        0

    E) \[-1\]

    Correct Answer: B

    Solution :

    \[PDi=\frac{{{\overline{M}}_{w}}}{{{\overline{M}}_{n}}}=\frac{40,000}{30,000}\] So, the value is more than 1.


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