Chemistry Hydrocarbons MDCAT 2012
PMDC Verified Question 59 of 65
The introduction of R - C(=O) group in benzene is called
A
Alkylation
B
Carbonyl reduction
C
Acylation
D
Formylation
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Acylation
Concept:

Reactions introducing specific functional groups onto an aromatic ring are named based on the functional group being attached.

Solution:

  • The \( \text{R}-\text{C}(=\text{O})- \) group is generally known as an acyl group.


  • Attaching this group to a benzene ring (typically via a Friedel-Crafts reaction with an acyl halide and \( \text{AlCl}_3 \)) is therefore formally termed acylation.


Why other options are incorrect:

  • Alkylation introduces a simple alkyl group (\( \text{R}- \)), not an acyl group.


  • Carbonyl reduction is the process of removing oxygen/adding hydrogen to a carbonyl group (e.g., Clemmensen reduction).


  • Formylation strictly refers to adding a formyl group (\( \text{H}-\text{C}(=\text{O})- \)), which is a specific, narrower subset of acylation.

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.

Previous Question All Hydrocarbons MCQs Next Question

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.

Enter Arena Sprint iOS App Android App