Aldehyde give precipitate with Fehling solution on:
Correct answer: C. Boiling
- A. Cooling
- B. Heating
- C. Boiling
- D. Do not give ppt.
Explanation
Aldehyde gives ppt by boilingFehling's Solution Test [an alkaline solution containing a cuprictartrate complex ion]: Aliphatic aldehydes form a brick-red precipitate withFehling's solution. To an aldehyde solution, add Fehling's solution and boil. Abrick red precipitate of cuprous oxide is formed. Ketones do not give this test.
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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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