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  4. Acetaldehyde on warming with Fehling solution gives a red precipitate of

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Q. Acetaldehyde on warming with Fehling solution gives a red precipitate of

Aldehydes Ketones and Carboxylic Acids

Solution:

Aldehyde on warming with Fehling solution give a red precipitate of cuprous oxide
$RCHO+2Cu (OH)_{2}+NaOH \to RCOONa+\underset{\text{red ppt}}{Cu_{2}O}+3H_{2}O$