Home Chemistry Alcohol, Phenol and Ether General An unknown alcohol is treated with the “Luca…
Chemistry Alcohol, Phenol and Ether General Single Correct MCQ
Published on: August 14, 2026

An unknown alcohol is treated with the “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism

A
Secondary alcohol by SN1
B
Tertiary alcohol by SN1
C
Secondary alcohol by SN2
D
Tertiary alcohol by SN2

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Text Solution

Verified by Experts
The correct answer is:
B

The reaction of alcohol with lucas reagent is mostly an SN1 reaction and the rate of reaction is directly proportional to the carbocation stability formed in the reaction, since 3° R–OH forms 3° carbocation hence it will react fastest.

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