Assertion :The molar mass obtained for benzoic acid in benzene is found to be nearly 244. Reason: Benzoic acid has the molecular formula $C_{6} H_{6} O_{2}$

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Assertion is correct. In benzene, the benzoic acid forms dimer. Hence, the observed molecular weight is twice the actual molecular weight $(2 \times 122 = 244)$ .
Reason is incorrect. The actual molecular formula of benzoic acid is $C_{7} H_{6} O_{2}$

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Assertion :The molar mass obtained for benzoic acid in benzene is found to be nearly 244. Reason: Benzoic acid has the molecular formula C6H6O2

The correct option is C Assertion is correct but Reason is incorrectAssertion is correct. In benzene, the benzoic acid forms dimer. Hence, the observed molecular weight is twice the actual molecular weight(2×122=244).Reason is incorrect. The actual molecular formula of benzoic acid is C7H6O2

Assertion :The molar mass obtained for benzoic acid in benzene is found to be nearly 244. Reason: Benzoic acid has the molecular formula $C_{6} H_{6} O_{2}$