Q37 / 180 · JIPMER 2015 · Chemistry

The number average molar mass and mass average molar mass of a polymer are respectively 30,000 and 40,000 . The polydispersity index (PDI) of the polymer is

  • A
    $-1$
  • B
    $0$
  • Correct answer
    C
    $\gt1$
  • D
    $ \lt 1$

Solution

Polydispersity index (PDI) $\begin{array}{r}=\frac{\text { Mass average molar mass }}{\text { Number average molar mass }}=\frac{M_W}{M_n} \\ \qquad \frac{40,000}{30,000}=1.3\gt1\end{array}$

Hence, the correct answer is option: 'C'.

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