Which of the following is NOT dihydric alcohol?

Which of the following is NOT dihydric alcohol?
  1. Catechol
  2. Resorcinol
  3. Phloroglucinol
  4. Hydroquinone

Solution

A dihydric alcohol contains two hydroxyl (-OH) groups on a benzene ring in the context of phenols.

Catechol is benzene-1,2-diol, resorcinol is benzene-1,3-diol, and hydroquinone is benzene-1,4-diol—each has two hydroxyl groups.

Phloroglucinol is benzene-1,3,5-triol with three hydroxyl groups, making it trihydric rather than dihydric.

Answer: $\boxed{C}$

Asked in: MHT CET 2025 (19 April Shift 2)

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