Question

Assertion : Ease of dehydraction of alcohols follows the order : Tertiary `gt` Secondary `gt` Primary.
Reason : Dehydration proceeds through the formation of oxonium ion.
A. If both assertion and reason are correct and reason is correct explanation for assertion.
B. If both assertion and reason are correct but reason is not correct explanation for assertion.
C. If assertion is correct but reason is incorrect.
D. If assertion and reason both are incorrect.

Answer 1

Correct Answer - B
Correct explanation : Dehydration proceeds through the formation of carbocation intermediate in the rate determining step. The relative stabilities of the carbocations are in the order : tertiary `gt` secondary `gt` primary. Oxonium ion is formed by the protonation of alcohol in the first step.