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Assertion: \( \bar{M}_{n} \) value is always greater than \( \bar{M}_{w} \) value for synthetic polymers. Reason: The mass average molecular weight of the polymer is equal to \( \bar{M}_{w} \)

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Assertion is incorrect but Reason is correct

Correct answer: Assertion is incorrect but Reason is correct

Solution

The assertion is false because for polymers, the weight-average molecular weight is generally greater than or equal to the number-average molecular weight, not the other way around. The reason is true: the mass average molecular weight is denoted by \(\bar{M}_w\).

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