Question

Which does not react with Fehling solution?

• A. $CH_{3}CHO$
• B. $C_{6}H_{5}CHO$
• C. $CH_{3}COCH_{3}$
• D. glucose

Answer 1

Answer: (C)

$CH_{3}COCH_{3}$

Answer 2

Aldehydes are oxidised by Fehling solution, while ketones do not react with Fehling solution $RCHO+\underset{\text{[from Fehling solution]}}{2Cu^{2+}}+3OH^{-} \to RCOO^{-}+\underset{\text{Red}}{{2Cu}} \downarrow +2H_{2}O$