Q .     The Pply Dispersity index (PDI) of a polymer is:
` (\overline{M}_w=` weight average molecular mass and `\overline{M}_n =` number average molecular mass)

EAMCET 2016
A

The product of `\overline{M}_n` and `\overline{M}_w`

B

The sum of `\overline{M}_n and \overline{M}_w`

C

The difference between `\overline{M}_w and \overline{M}_n`

D

The ratio between `\overline{M}_w` and `\overline{M}_n`

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