Fehling's solution can be used to distinguish between which of the following pairs of compounds?

Step-by-step solution

Fehling's solution is a mild oxidizing agent used to differentiate aliphatic aldehydes from aromatic aldehydes and ketones. Aliphatic aldehydes like CH ₃ CHO reduce Fehling's solution to form a red precipitate of Cu ₂ O . Aromatic aldehydes like C ₆ H ₅ CHO do not reduce Fehling's solution. -hydroxy ketones like CH ₃ COCH ₂ OH also reduce Fehling's solution because they tautomerize into an enediol intermediate in the alkaline medium, which then gets oxidized. Thus, both CH ₃ CHO and CH ₃ COCH ₂ OH give a positive F