Chemistry Fundamental Principles of Organic Chemistry MDCAT 2017
PMDC Verified Question 74 of 83
Which one is a functional group of carboxylic acid:
A
\( \text{-C}(=\text{O})\text{OH} \)
B
\( \text{-C}(=\text{O})- \)
C
\( \text{-C}(=\text{O})\text{O-C} \)
D
None of these
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: \( \text{-C}(=\text{O})\text{OH} \)
Concept:

A functional group is a specific arrangement of atoms responsible for the chemical properties of a molecule. Carboxylic acids contain the carboxyl group.

Solution:

  • The carboxyl group is composed of a carbonyl (\( \text{C}=\text{O} \)) bonded to a hydroxyl (\( \text{-OH} \)).


  • This is written structurally as \( \text{-COOH} \) or \( \text{-C}(=\text{O})\text{OH} \).


  • Option A matches this exactly.


Why other options are incorrect:

Option B represents a ketone (carbonyl) group. Option C represents an ester linkage (\( \text{-COOR} \)).

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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