Answer the question on the basis of passage given below:
Alcohols and phenols are formed when a hydrogen atom in a hydrocarbon, aliphatic and aromatic respectively, is replaced by –OH group. The substitution of a hydrogen atom in a hydrocarbon by an alkoxy or aryloxy group forms ethers.
Alcohols and phenols consist of two parts, an alkyl/aryl group and a hydroxyl group. The properties of alcohols and phenols are primarily due to the hydroxyl group. The nature of alkyl and aryl groups simply modifies these properties. Alcohols react both as nucleophiles and electrophiles whereas in phenols, the reactions that take place on the aromatic ring are electrophilic substitution reactions.
The IUPAC name of the following compound is:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 2-Phenylpropan-2-ol
For an alcohol, the parent chain is the longest carbon chain bearing the –OH group, numbered to give the OH carbon the lowest locant; a benzene ring on the chain is named as a phenyl substituent.
The compound is \( \ce{C6H5-C(OH)(CH3)2} \). The longest chain through the C–OH carbon runs \( \ce{CH3-C(OH)-CH3} \): three carbons (propane), with OH and the phenyl group both on C-2:
\( \overset{1}{C}H_3-\overset{2}{C}(OH)(C_6H_5)-\overset{3}{C}H_3 \)
The name is 2-Phenylpropan-2-ol, a tertiary alcohol.
NCERT (2026-27 edition):
Nomenclature – …
