Q21 / 150 · MHT CET 2025 (21 Apr Shift 1) · Chemistry

Which from following compounds does NOT contain phenolic -OH group?

  • A
    Curcumin
  • B
    Eugenol
  • C
    Gallic acid
  • Correct answer
    D
    Ascorbic 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'.

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