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

  • question_answer
    Number average molecular mass, \[{{\overline{M}}_{n}}\] and weight average molecular mass \[\left( {{\overline{M}}_{w}} \right)\] of synthetic polymers are related as

    A) \[{{\overline{M}}_{n}}={{({{\overline{M}}_{w}})}^{1/2}}\]

    B) \[{{\overline{M}}_{n}}={{\overline{M}}_{w}}\]

    C) \[{{\overline{M}}_{w}}>{{\overline{M}}_{n}}\]           

    D) \[{{\overline{M}}_{w}}<{{\overline{M}}_{n}}\]

    Correct Answer: C

    Solution :

    [c] \[PDI=\frac{{{\overline{M}}_{w}}}{{{\overline{M}}_{n}}}\] For synthetic polymer, PDI > 1 \[\therefore {{\overline{M}}_{w}}>{{\overline{M}}_{n}}\]


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