Chemistry Alcohols & Phenols MDCAT 2014
PMDC Verified Question 88 of 95
The formula of 2, 4, 6-Tribromophenol is
A
\(\text{C}_6\text{H}_4\text{BrOH}\)
B
\(\text{C}_6\text{H}_3\text{Br}_2\text{OH}\)
C
\(\text{C}_6\text{H}_2\text{Br}_3\text{OH}\)
D
\(\text{C}_6\text{H}_5\text{Br}_3\text{OH}\)
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: \(\text{C}_6\text{H}_2\text{Br}_3\text{OH}\)
Concept:

Nomenclature requires numbering the benzene ring starting from the principal functional group (the -OH group at position 1).

Formula:

$$ \text{C}_6\text{H}_2\text{Br}_3\text{OH} $$

Solution:

  • The hydroxyl group is at C-1.


  • Bromine atoms are located symmetrically at the two ortho positions (C-2 and C-6) and the para position (C-4).


  • This structural arrangement forms 2,4,6-tribromophenol.


Why other options are incorrect:

The other placeholders represent di-substituted variants or incorrect positional isomers that do not match the "2,4,6" numbering scheme.

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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