Match List-I with List-II
| List-I | List-II |
| Common Name | IUPAC Name |
| (A) m-cresol | (I) Benzene- 1,2- diol |
| (B) Resorcinol | (II) 3-Methylphenol |
| (C) Catechol | (III) Benzene- 1,4- diol |
| (D) Hydroquinone | (IV) Benzene- 1,3- diol |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A) - (II), (B) - (IV), (C) - (I), (D) - (III)
In IUPAC names of phenols, the carbon bearing the –OH group is C-1. Compounds with two –OH groups on the ring are named benzenediols, with locants showing their positions: 1,2 (ortho), 1,3 (meta) and 1,4 (para). Methylphenols are commonly called cresols.
(A) m-cresol — This matches (II) 3-Methylphenol. The methyl group is meta to –OH, that is, on C-3.
(B) Resorcinol — This matches (IV) Benzene- 1,3- diol. The two –OH groups are meta to each other.
(C) Catechol — This matches (I) Benzene- 1,2- diol. The two –OH groups are on adjacent carbons (ortho).
(D) Hydroquinone — This matches (III) Benzene- 1,4- diol. The two –OH groups are para to each other; hydroquinone is also called quinol.
Shortcut: The pair (C)–(I) appears in Options (2) and (3), and (A)–(II) then leaves only Option (3).
NCERT (2026-27 edition):
Nomenclature – …
