Answer to Question #57709 in Organic Chemistry for reena

Question

the reaction of aldehydes and ketones with Fehling's solution produces different things
what is the difference between these reactions.

Answer 1

Aldehydes are oxidized by Fehling’s solution giving the corresponding carboxylic acids. You can see that
the blue solution loses its colour and red substance precipitates. Ketones don’t react with this reagent.
Fehling’s solution contains Cu2+, namely, the bistartratocuprate (II), which is reduced to Cu2O (red
precipitate) during the reaction with aldehydes:
R-CHO + 2Cu2+ + 2H2O → R-COOH + Cu2O + 4H+