Which of the following does NOT give a positive Fehling's test?
Correct answer: C. Acetone
- A. Ethanal
- B. Glucose
- C. Acetone
- D. Methanal
Explanation
Fehling's reagent oxidizes aldehydes but not ketones. Acetone is a ketone and remains unreactive.
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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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