Question

The reagent(s) which can be used to distinguish acetophenone from benzophenone is (are):

• A. 2,4-dinitrophenylhydrazine
• B. aqueous solution of NaHSO₃
• C. Benedict reagent
• D. I and Na₂CO₃

Hint:

2,4-Dinitrophenylhydrazine reacts with carbonyl compounds to form hydrazones and is used to distinguish different aldehydes and ketones.

Answer 1

The Correct Option is A

Step 1: 2,4-Dinitrophenylhydrazine reacts with carbonyl compounds to form hydrazones. This reagent can distinguish acetophenone from benzophenone.
Step 2: Acetophenone reacts to form a hydrazone, whereas benzophenone does not.

Final Answer: \[ \boxed{2,4\text{-dinitrophenylhydrazine}} \]