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NEET Chemistry Polymers / बहुलक Question Bank Self Evaluation Test - Polymers

  • question_answer
    The mass average molecular mass & number average molecular mass of a polymer are 40,000 and 30,000 respectively. The polydispersity index of polymer will be

    A) <1                   

    B) >1  

    C) 1                                 

    D) 0

    Correct Answer: B

    Solution :

    [b] Average number molecular weight \[{{\overline{M}}_{n}}=30,000\] Average mass molecular weight \[{{\overline{M}}_{w}}=40,000\] Polydispersity index \[(PDI)\frac{{{\overline{M}}_{n}}}{{{\overline{M}}_{w}}}=\frac{40,000}{30,000}=1.33\]


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