Chemistry - Nomenclature Question with Solution | TestHub

Correct answer: 3 (c, d, e).

(a) Incorrect. Numbering from the COOH carbon (C1), NO₂ is at C2 and CHO at C5: 5-formyl-2-nitrobenzoic acid (preferred). The given locants are wrong.

(b) Incorrect. CHO has the highest priority, so the parent is benzaldehyde: 2-methoxy-4-nitrobenzaldehyde.

(c) Correct. 2-(Ethanoyloxy)benzenecarboxylic acid is a systematic IUPAC name (benzoic acid is the preferred one).

(d) Correct. 1-Chloro-4-methylbenzene.

(e) Correct. 2,4,6-Trimethylbenzenecarbonyl chloride.