Fehling's solution is a test for:
Correct answer: B. Aliphatic aldehydes
- A. Aromatic aldehydes
- B. Aliphatic aldehydes
- C. Ketones
- D. Alcohols
Explanation
Fehling's test is used to differentiate between aldehydes and ketones. It is a weak oxidizing agent that gives a positive result (a red precipitate of Cu₂O) with aliphatic aldehydes, but it is generally not strong enough to oxidize aromatic aldehydes or 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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