Chemistry Hydrocarbons BUMHS 2024
PMDC Verified Question 11 of 65
____ is regarded as the simplest and the parent member of aromatic class of compounds.
A
Methanol
B
Acetylene
C
Benzene
D
Acetic acid
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Benzene
Concept:

Aromaticity refers to compounds containing planar, cyclic, resonance-stabilized pi-electron systems that follow Hückel's rule (4n+2 pi electrons).

Solution:

  • The foundation of aromatic chemistry is the six-membered carbon ring with three delocalized double bonds.


  • This structure, \( \text{C}_6\text{H}_6 \), is Benzene.


  • Virtually all classical aromatic compounds are considered derivatives of benzene, making it the simplest and universally recognized "parent" member of the arene family.


Why other options are incorrect:

  • Methanol and Acetic acid are aliphatic, oxygen-containing compounds.


  • Acetylene (ethyne) is a linear, aliphatic alkyne, not a cyclic aromatic ring.

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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