Chemistry Carboxylic Acids SZABMU 2024
PMDC Verified Question 10 of 94
Ethyl acetate is an
A
Amide
B
Ester
C
Acid halide
D
Carboxylic acid
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Ester
Concept:

Organic compounds ending in the suffix "-ate" denote a derivative of a carboxylic acid where the acidic hydrogen has been replaced by an alkyl group (in covalent molecules) or a metal (in ionic salts).

Formula:

$$ \text{CH}_3\text{-CO-O-CH}_2\text{CH}_3 $$

Solution:

  • The structure features an acyl group (\( \text{CH}_3\text{CO-} \)) bonded to an alkoxy group (\( \text{-OCH}_2\text{CH}_3 \)).


  • This specific \( \text{R-CO-O-R}' \) functional group defines an ester.


Why other options are incorrect:

Amides have an \( \text{N} \) bonded to the carbonyl. Acid halides have a halogen. Carboxylic acids have a free \( -\text{OH} \).

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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