Question 38

Common name of Benzene-1,2-diol is:

We need the common name of benzene-1,2-diol.

Benzene-1,2-diol has two hydroxyl (-OH) groups on adjacent carbon atoms of the benzene ring (ortho positions).

- Benzene-1,2-diol (ortho) = Catechol (also called pyrocatechol)

- Benzene-1,3-diol (meta) = Resorcinol

- Benzene-1,4-diol (para) = Hydroquinone (quinol)

Note: o-Cresol is 2-methylphenol, not a diol.

The correct answer is Option (1): Catechol.

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