Question

What happens, when-
(i) acetaldehyde reacts with Fehling solution;
(ii) acetic acid reacts with phosphorus pentachloride?​

Answer 1

i) When acetaldehyde is heated with Fehling’s solution than a red precipitation is formed.
ii) When acetic acid is heated with phosphorus pentachloride than acetyl chloride is obtained and in this reaction -COOH is converted into -COCL group.