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Manipal Medical Manipal Medical Solved Paper-2015

  • question_answer
    A sample of polymer contains 30% molecules with molecular mass 20,000, 40% with molecular mass 20,000 and 30% .with molecular mass 60,000. What is the number average molecular mass of the polymer?

    A) 27,000                     

    B) 36,000

    C) 43,000                     

    D) 64,000

    Correct Answer: B

    Solution :

    \[\overline{{{M}_{n}}}=\frac{(30\times 20000)+(40\times 30000)+(30\times 60000)}{30+40+30}\] \[=36000\]


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