Assertion: $C_{2} H_{5} C l$ gives ethyl benzene with benzene is presence of Anhydrous $A l C l_{3}$
Reason: Anhydrous $A l C l_{3}$ acts as Lewis acid generates ethyl carbonium ion electrophile

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Assertion is true but Reason is false

Both (A) and Reason are true but Reason is not the correct explanation of Assertion

Both Assertion & Reason are true and Reason is the correct explanation of Assertion

Assertion is false but Reason is true

answer is A.

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Detailed Solution

Since, $A l C l_{3}$ acts as a Lewis-acid and generates Ethyl-carbo cation.
It $(C H_{3} - \overset{\oplus}{C} H_{2})$ acts as an electrophile. So electrophile $(C H_{3} - \overset{\oplus}{C} H_{2})$ attacks on benzene to form ethyl benzene. It is an electrophilic substitution reaction.