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A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a racemic mixture of α-hydroxy acid. The carbonyl compound is
  • a)
    formaldehyde
  • b)
    acetaldehyde
  • c)
    acetone
  • d)
    None of these
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin w...
Explanation:

Acetaldehyde is the carbonyl compound that reacts with hydrogen cyanide to form cyanohydrin.
- Acetaldehyde (CH3CHO) has a carbonyl group that can react with hydrogen cyanide (HCN) to form a cyanohydrin.
- The reaction between acetaldehyde and hydrogen cyanide proceeds via a nucleophilic addition mechanism to form the cyanohydrin.
- The cyanohydrin can undergo hydrolysis to form a racemic mixture of α-hydroxy acid.

Why acetaldehyde?
- Formaldehyde does not have an α-hydrogen and therefore cannot form a cyanohydrin or an α-hydroxy acid.
- Acetone can also react with hydrogen cyanide to form a cyanohydrin, but it does not form a racemic mixture of α-hydroxy acid upon hydrolysis.
Therefore, the correct answer is option 'B. acetaldehyde'.
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A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a racemic mixture of α-hydroxy acid. The carbonyl compound isa) formaldehyde b) acetaldehyde c) acetone d) None of these Correct answer is option 'B'. Can you explain this answer?
Question Description
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