Chemistry Alcohols & Phenols UHS 2022
PMDC Verified Question 37 of 95
What is the common name of 1, 2, 3-propantriol?
A
Butyl alcohol
B
Glycol
C
Glycerol
D
Propyl alcohol
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Glycerol
Concept:

Polyhydric alcohols are often known by their trivial, industrially common names.

Formula:

$$ \text{CH}_2(\text{OH})-\text{CH}(\text{OH})-\text{CH}_2(\text{OH}) $$

Solution:

  • The IUPAC name 1,2,3-propanetriol indicates a three-carbon chain with a hydroxyl group on every carbon.


  • This specific molecule is globally recognized by its common name, glycerol (or glycerin).


Why other options are incorrect:

Glycol typically refers to ethylene glycol (1,2-ethanediol). Propyl and butyl alcohols are monohydric alcohols containing three and four carbons, respectively.

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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