NEET Chemistry (general) MCQ Question
Which of the following statements about the preparation of aldehydes and ketones is correct?
Aldehydes can be prepared from the reduction of nitriles using stannous chloride.
Ketones can be directly obtained from the hydration of alkenes without any catalysts.
The Rosenmund reduction is used to convert carboxylic acids to aldehydes.
Ethyne can yield acetaldehyde only in the absence of catalysts.
Correct Answer
Detailed Explanation
Statement A is correct as nitriles can be reduced to aldehydes via the Stephen reaction, which involves stannous chloride. Statements B and D are incorrect because alkenes require catalysts for hydration, and ethyne produces acetaldehyde with a catalyst present. Statement C is also incorrect as the Rosenmund reduction involves acyl chlorides converting to aldehydes, not carboxylic acids.
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