Question

Which is not true about acetophenone? 

(a) It reacts with 2, 4-dinitrophenylhydrazine to form 2, 4-dinitrophenylhydrazone 

(b) It reacts with Tollen's reagent to form silver mirror 

(c) It reacts with I₂/NaOH to form iodoform 

(d) On oxidation with alkaline KMnO₄ followed by hydrolysis, it gives benzoic acid

Answer 1

(b) It reacts with Tollen's reagent to form silver mirror 

Acetophenone reacts with 2-4-DiNitroPhenylHydrazine test to form 2-4-DiNitroPhenylHydrazone.

On drastic oxidation with KMnO₄, H⁺ acetophenone forms benzoic acid. 

As acetophenone does not contain any hydrogen atom directly attached to the carbonyl carbon like aldehydes it does not give Tollen's or Fehling test.

Acetophenone reacts with NaOH, Cl₂ to form Chloroform which is colourless.