Question

On oxidation with sodium dichromate and
sulphuric acid aniline gives aniline black. On
controlled oxidation with the same reagent the
product is
(a) Benzoic acid (b) Nitrobenzene
(c) p-Benzoquinone (d) Phenol

Answer 1

Answer:

Nitrobenzene is probably the answer

Answer 2

(c) p-Benzoquinone

Explanation:

Aniline can be  oxidized easily. Different oxidizing agents gives different products. Aniline black is obtained by reaction of potassium dichromate with acid solution. Aniline even undergoes oxidation when exposed to the air and as a result it takes on a dirty red-brown color. On oxidation with sodium dichromate and sulphuric acid, aniline gives aniline black. On controlled oxidation with the same reagent, the product is p-Benzoquinone.

Option C is the answer.