Which of the following test can detect presence of both aldehydes and ketones?
Correct answer: C. Reaction with 2,4-dinitrophenylhydrazine
- A. Tollen's test
- B. Reaction with hydrazine
- C. Reaction with 2,4-dinitrophenylhydrazine
- D. Reaction with Ammonia
Explanation
Option C is correct as "2,4-DNPH" reacts with aldehydes and ketones to give a orange precipitate by reacting with the carbonyl group.
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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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