Chemistry Carboxylic Acids MDCAT 2011
PMDC Verified Question 88 of 94
\( \text{CH}_3\text{CN} + \text{HCl} \longrightarrow \text{A} + \text{B} \) in presence of water in the above reaction A and B are:
A
Acetic acid and acid amide
B
Acetic acid and methyl chloride
C
Acetic acid and ammonia
D
Acetic acid and ammonium chloride
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Acetic acid and ammonium chloride
Concept:

The acid-catalyzed hydrolysis of an alkyl nitrile (methyl cyanide) yields a carboxylic acid and an ammonium salt.

Formula:

$$ \text{CH}_3\text{-C}\equiv\text{N} + 2\text{H}_2\text{O} + \text{HCl} \longrightarrow \text{CH}_3\text{COOH} + \text{NH}_4\text{Cl} $$

Solution:

  • Methyl cyanide (\( \text{CH}_3\text{CN} \)) undergoes complete hydrolysis in the presence of water and \( \text{HCl} \).


  • The product is ethanoic acid (acetic acid) and ammonium chloride (\( \text{NH}_4\text{Cl} \)).


Why other options are incorrect:

Ammonia is formed only during base-catalyzed hydrolysis. Methyl chloride and acid amides are not the final stable products of complete acidic hydrolysis.

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 Carboxylic Acids 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