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Which of the following oxidizes phenol t...

Which of the following oxidizes phenol to `p-`benzoquinone?

A

`Na_(2)Cr_(2)O_(7)//H_(2)SO_(4)`

B

`KMnO_(4)` and `NaOH`

C

`CrO_(2)Cl_(2)`

D

both `(1)` and `(3)`

Text Solution

Verified by Experts

The correct Answer is:
D

Quinones are cyclic unsaturated diketones in which the doube bonds and the keto groups are conjugated. They are not aromatic compounds. Two quinones derived from benzene are:

A characteristic property of quinones is their colour, the `p-`compounds being yellow and the `o-`compounds being usually red. the quinonoid structures are powerful chromophores.
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