Which of the following reagents react in same maner with HCHO, CH3CH and CH3COCH3:
Correct answer: A. HCN
- A. HCN
- B. Ammonical AgNO3
- C. Cu(OH)2 / NaOH
- D. Cu(OH)2 only
Explanation
HCN reacts with aldehydes and ketones to form cyanohydrins. A cyanohydrin is formed by the nucleophilic addition of HCN across the carbonyl group. This reaction is a common test for aldehydes and ketones.
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About Aldehydes and Ketones
Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.
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