**Phenol** differs from an alcohol because:
APhenol's OH is bonded to an sp² carbon of an aromatic ring
BPhenol's OH is bonded to an sp³ carbon
CPhenol has no OH group
DBoth phenol and alcohol have OH on aromatic rings
Answer & Solution
Correct answer: A. Phenol's OH is bonded to an sp² carbon of an aromatic ring
Phenols: -OH bonded directly to an aromatic-ring carbon (sp²). Alcohols: -OH on aliphatic sp³ carbon. Crucial difference: phenol's lone pair conjugates with ring ⇒ acidic; alcohol is essentially neutral.
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