Chemistry Alcohols & Phenols MDCAT 2018
PMDC Verified Question 73 of 95
Alcohol in which carbon atom bonded to \(-\text{OH}\) group is further attached with three alkyl group is
A
Aromatic alcohol
B
Primary alcohol
C
Secondary alcohol
D
Tertiary alcohol
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Tertiary alcohol
Concept:

Alcohols are structurally classified by the substitution pattern on the alpha carbon (the \(\text{C}-\text{OH}\) carbon).

Formula:

$$ \text{R}_3\text{C-OH} $$

Solution:

  • If the alpha carbon is attached to zero or one alkyl group, it's primary.


  • If attached to two, it's secondary.


  • If attached directly to three alkyl groups, it is strictly classified as a tertiary (3°) alcohol.


Why other options are incorrect:

By absolute definition, primary and secondary lack three alkyl groups. Aromatic alcohols have the -OH group attached to an alkyl chain that is attached to a benzene ring (like benzyl alcohol), which doesn't specify the degree of substitution.

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