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The oxidation of phenol with chromic acid gives.

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an aldehyde

a conjugated diketone

a simple diketone

ortho benzoquinone

answer is B.

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Detailed Solution

Oxidation of Phenol with Chromic Acid

When phenol is oxidized by chromic acid, it undergoes transformation to form benzoquinone.

Phenol (C₆H₅OH) is converted into benzoquinone (C₆H₄O₂) which contains two conjugated carbonyl groups.

Reaction:

Phenol → Benzoquinone

This product is also called p-benzoquinone or 1,4-benzoquinone due to the para positioning of ketone groups on the aromatic ring.

The oxidation involves conversion of hydroxyl groups to carbonyls, resulting in a conjugated diketone.

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