question_answer

Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as

Assertion: Benzene reacts with \[\text{C}{{\text{H}}_{\text{3}}}\text{Cl}\] using \[\text{AlC}{{\text{l}}_{\text{3}}}\]as catalyst to form methyl benzene. This reaction is called Perkin reactions. Reason: \[\text{AlC}{{\text{l}}_{\text{3}}}\]acts as an electrophile in the reaction.

A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

C) If Assertion is true but Reason is false.

D) If both Assertion and Reason are false.

Correct Answer: D

Solution :

When benzene reacts with \[\text{C}{{\text{H}}_{\text{3}}}\text{Cl}\]using \[\text{AlC}{{\text{l}}_{\text{3}}}\]as catalyst, toluene is formed. This is called Friedel Crafts reaction (alkylation). \[C{{H}_{3}}Cl+AlC{{l}_{3}}\xrightarrow{{}}\underset{\text{electrophile}}{\mathop{CH_{3}^{+}}}\,+AlCl_{4}^{-}\] \[{{H}^{+}}+AlCl_{4}^{-}\xrightarrow{{}}HCl+AlC{{l}_{3}}\]