Question

Assertion: Dehydration of alcohols can be carried out with conc. $H_{2}S{O}_4$ but not with conc. $HCl$.
Reason: $H_{2}S{O}_4$ is dibasic while $HCl$ is monobasic.

• A. Both Assertion and Reason are true and Reason is the correct explanation to Assertion
• B. Both Assertion and Reason are true and Reason is not the correct explanation to Assertion
• C. Assertion is true but Reason is false
• D. Assertion is false but Reason is true

Answer 1

The correct option is B Both Assertion and Reason are true and Reason is not the correct explanation to Assertion

Dehydration of alcohols can be carried out with conc. $H_{2}S{O}_4$ as it is a dehydrating agent and removes a molecule of water from alcohols resulting in the formation of alkenes at higher temperatures. Conc. $HCl$ is not a dehydrating agent.
$H_{2}S{O}_4$ is indeed a dibasic acid and $HCl$ is not. But it is not the reason that $HCl$ is not a dehydrating agent.

So, both assertion and reason are true but the reason is not the correct explanation to assertion.

The correct option is 'B'.