Q21 / 150 · MHT CET 2025 (21 Apr Shift 1) · Chemistry
Which from following compounds does NOT contain phenolic -OH group?
- ACurcumin
- BEugenol
- CGallic acid
- Correct answerDAscorbic acid
Solution
A phenolic $\mathrm{-OH}$ group requires attachment directly to an aromatic benzene ring.
Curcumin contains two phenolic $\mathrm{-OH}$ groups, each bonded to substituted benzene rings.
Eugenol has one phenolic $\mathrm{-OH}$ group on its benzene ring.
Gallic acid ($3,4,5$-trihydroxybenzoic acid) contains three phenolic $\mathrm{-OH}$ groups.
Ascorbic acid features enediol groups within a furanone lactone ring system, lacking any aromatic benzene ring and therefore no phenolic $\mathrm{-OH}$ group.
The compound without a phenolic $\mathrm{-OH}$ group is $\boxed{D}$.
Hence, the correct answer is option: 'D'.