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Target Exam

CUET

Subject

Chemistry

Chapter

Organic: Aldehydes, Ketones and Carboxylic Acids

Question:

What happens when acetophenone is treated with HCN? 

Options:

Acetophenone phenyl hydrazone 

Acetophenone cyanohydrin 

Methyl phenyl carbinol

None of the above 

Correct Answer:

Acetophenone cyanohydrin 

Explanation:

The correct answer is option 2. Acetophenone cyanohydrin.

When acetophenone \((C_6H_5COCH_3)\) is treated with hydrogen cyanide \((HCN)\), it undergoes a nucleophilic addition reaction at the carbonyl carbon of the ketone group. This reaction is known as cyanohydrin formation.

The product formed is acetophenone cyanohydrin, which has the following structure:

Mechanism:

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