Choose the alcohol which on oxidation with chromic anhydride will give a ketone.

The correct answer is Option (3) →

Oxidation with chromic anhydride:

Primary alcohol → Aldehyde → Acid

Secondary alcohol → Ketone

Tertiary alcohol → No oxidation

Detailed Explanation

Option 1: Phenol

Phenols do not undergo normal oxidation to ketones with chromic anhydride. They typically form quinones or undergo ring oxidation.

Option 2: Benzyl alcohol

Benzyl alcohol is a primary alcohol. On oxidation with chromic anhydride, it forms benzaldehyde or further oxidizes to benzoic acid.

Option 3: Cyclohexanol

Cyclohexanol is a secondary alcohol. Secondary alcohols oxidize to ketones.

Cyclohexanol $\rightarrow$ Cyclohexanone

Option 4: Cyclohexylmethanol

This is a primary alcohol and will oxidize to aldehyde and then acid, not ketone.