Chemistry Alcohols & Phenols ETEA 2023
PMDC Verified Question 28 of 95
Benzene-1,3-diols is also known as:
A
Catechol
B
Resorcinol
C
Hydroquinone
D
O-cresol
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Resorcinol
Concept:

Dihydroxybenzenes have well-established historical trivial names depending on the relative positions of the two hydroxyl groups.

Formula:

$$ \text{C}_6\text{H}_4(\text{OH})_2 $$

Solution:

  • Benzene-1,2-diol (ortho) is known as Catechol.


  • Benzene-1,3-diol (meta) is known as Resorcinol.


  • Benzene-1,4-diol (para) is known as Hydroquinone.


Why other options are incorrect:

Options A and C refer to the 1,2 and 1,4 isomers, respectively. Option D (o-cresol) contains one -OH group and one -CH3 group (2-methylphenol), not two hydroxyls.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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