Question

$S _{ N } 1$ reaction is basically a solvolysis reaction. Polar protic solvents help the substrate to ionise and by the way get involved in $S _{ N } 1$ reaction.

• A. If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion:
• B. If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion:
• C. If Assertion: is true but Reason: is false
• D. If both Assertion: and Reason: are false

Answer 1

Answer: (A)

If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion:

Answer 2

In $S_{N} 1$ reaction, first the substrate gets ionised and then, the nucleophile attacks at the cation. To ionise a substrate, presence of polar protic solvent is necessary, thus $S _{ N } 1$ reactions are basically solvolysis reactions. Hence, Reason is the correct explanation for Assertion.