Chemistry Alcohols & Phenols DUHS 2022
PMDC Verified Question 47 of 95
Secondary alcohols have.
A
One \(\beta\)-C
B
Three \(\beta\)-C
C
No \(\beta\)-C
D
Two \(\beta\)-C
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Two \(\beta\)-C
Concept:

The alpha (\(\alpha\)) carbon is the one directly attached to the -OH group. Any carbons attached directly to the alpha carbon are beta (\(\beta\)) carbons.

Formula:

Not applicable to this conceptual question.

Solution:

  • By definition, a secondary alcohol has the -OH group on a carbon bonded to exactly two other alkyl groups.


  • Therefore, the alpha carbon is directly bonded to exactly two beta-carbons.


Why other options are incorrect:

A primary alcohol typically has one beta-carbon. A tertiary alcohol has three beta-carbons. Methanol has no beta-carbons.

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