Which one of the following tests is given by both aldehydes and ketones?
Correct answer: C. 2, 4 DNPH test
- A. Silver mirror test
- B. Fehling's solution
- C. 2, 4 DNPH test
- D. Benedict's solution test
Explanation
Only aldehydes can react with mild reagents such as Fehling's solution and Benedict's solution and also show positive results with the silver mirror test, whereas 2,4-DNPH reacts with carbonyl compounds (both aldehydes and ketones) to give a colored precipitate.
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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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