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Question

Which of the following cyanohydrins on hydrolysis give an optically active acid giving iodoform reaction?

A
Acetone cyanohydrin
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B
Propionaldehyde cyanohydrin
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C
Acetaldehyde cyanohydrin
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D
Formaldehyde cyanohydrin
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Solution

The correct option is C Acetaldehyde cyanohydrin
Acetaldehyde cyanohydrin on hydrolysis give an optically active acid giving iodoform reaction.

This acid can be easily oxidized to contain CH3CO group which is required for positive iodoform test.

Option C is correct.

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