NEET Chemistry Nucleophilic Addition Assertion Reason Question
Assertion (A): Aldehydes and ketones react with hydrogen cyanide to form cyanohydrins, with cyanide ion acting as a stronger nucleophile than pure HCN.
Reason (R): The nucleophilic addition of hydrogen cyanide is catalyzed by a base to generate cyanide ions.
Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true but (R) is not the correct explanation of (A).
(A) is true but (R) is false.
(A) is false but (R) is true.
Correct Answer
Detailed Explanation
The NCERT context states that hydrogen cyanide reacts very slowly with aldehydes and ketones, and the reaction is catalyzed by a base to generate cyanide ions, which are stronger nucleophiles, forming cyanohydrins.
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