(B) Acetophenone $(C_6H_5COCH_3)$ is a ketone. Ketones do not reduce Tollen's reagent,so it does not form a silver mirror. It reacts with $2,4-DNP$ as

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It reacts with Tollen's reagent to form silver mirror.

(B) Acetophenone $(C_6H_5COCH_3)$ is a ketone. Ketones do not reduce Tollen's reagent,so it does not form a silver mirror. It reacts with $2,4-DNP$ as it contains a carbonyl group. It gives a positive iodoform test due to the presence of the $CH_3CO-$ group. Oxidation of acetophenone with alkaline $KMnO_4$ followed by hydrolysis yields benzoic acid.

Class 12 Chemistry 8-1.Aldehydes and Ketones Properties

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Which is not true about acetophenone?

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A
It reacts with $2,4-DNP$ to form $2,4-dinitrophenylhydrazone$.
B
It reacts with Tollen's reagent to form silver mirror.
C
It reacts with $I_2/NaOH$ to form iodoform.
D
On oxidation with alkaline $KMnO_4$ followed by hydrolysis,it gives benzoic acid.