Assertion: Benzaldehyde and formaldehyde undergo Cannizzaro reaction.
Reason: Benzaldehyde are almost as reactive as formaldehyde.

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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Both Assertation and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Benzaldehyde and formaldehyde undergo Cannizzaro reaction as they do not contain α-hydrogen and thus undergo Cannizzaro reaction.
Formaldehyde is more reactive than aromatic aldehydes in nucleophilic addition reactions. This is due to electron-donating resonance effect of aromatic ring which makes carbonyl carbon less electrophilic

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