Number average molecular mass, ${\bar{M}}_{n}$ and weight average molecular mass ${\bar{M}}_{w}$ of synthetic polymers are related as

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${\bar{M}}_{w} < {\bar{M}}_{n}$

${\bar{M}}_{w} > {\bar{M}}_{n}$

${\bar{M}}_{n} = {\bar{M}}_{w}$

${\bar{M}}_{n} = {({\bar{M}}_{w})}^{1 / 2}$

answer is C.

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Detailed Solution

This is because man made polymers have a wide range of molecular chain lengths and weights, which increases their dispersity in chain length and weight .so for man made polymers Mw > Mn

for natural polymers usually the PDI value is equal to one

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