Question

Phenol
on
oxidation
with
air gives​

Answer 1

Phenol slowly oxidises on exposure to air and turns pink in color. At first, quinone is formed which again reacts with phenol to form a polymerised product phenoquinone which is red in color.

Answer 2

Phenols are rather easily oxidized despite the absence of a hydrogen atom on the hydroxyl bearing carbon. Among the colored products from the oxidation of phenol by chromic acid is the dicarbonyl compound para-benzoquinone (also known as 1,4-benzoquinone or simply quinone); an ortho isomer is also known