Chemistry Alcohols & Phenols PMC 2021
PMDC Verified Question 57 of 95
The compounds which are formed by the replacement of one of the H of water by a alkyl group are called as _?
A
Ethers
B
Phenols
C
Alcohols
D
Carboxylic acids
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Alcohols
Concept:

We can conceptually view many organic classes as derivatives of water (\(\text{H-O-H}\)).

Formula:

$$ \text{H-O-H} \xrightarrow{-\text{H}, +\text{R}} \text{R-O-H} $$

Solution:

  • If one hydrogen of water is replaced by an alkyl group (R), the resulting structure is R-OH.


  • The generic formula R-OH defines an alcohol.


Why other options are incorrect:

Ethers occur when both hydrogens of water are replaced by alkyl groups (R-O-R). Phenols occur when replaced by an aryl group (benzene ring), not an alkyl group. Carboxylic acids contain an acyl group.

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 Alcohols & Phenols 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