Question

When acetaldehyde is heated with Fehlings's solution it gives a precipitate of

• A. Cu
• B. CuO
• C. $C{u}_{2}O$
• D. $Cu+C{u}_{2}O+CuO$

Answer 1

The correct option is C $C{u}_{2}O$


Aliphatic aldehyde on warming with Fehling solution A give a red precipitate of cuprous oxide.
The reaction is as follows:
Benzaldehyde and ketones give negative Fehling's test. Hence, the correct answer is option (c).