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General Mechanism of Electrophilic Aromatic Substitution

Assertion A :...

Question

Assertion (A) : Friedel-Crafts reaction of benzene with n-propyl chloride gives isopropylbenzene.
Reason (R) : Benzene undergoes electrophilic substitution readily.

A

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

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B

Both Assertion and Reason are true and Reason is not correct explanation of Assertion

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C

Assertion is true but Reason is false

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D

Both Assertion and Reason are false

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Solution

The correct option is B Both Assertion and Reason are true and Reason is not correct explanation of Assertion
Benzene undergoes electrophilic substitution reaction like halogenation, nitration, sulphonation and Friedel craft reaction.

Friedel-Crafts reaction :

$P h - H + C_{3} H_{7} C l A l C l_{3} - -- \to P h - C H (C H_{3})_{2} + H C l$

This is due to the formation of stable carbocation (formed as intermediate).

Hence the correct option is B.

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Similar questions

Q. Read the assertion and reason carefully to mark the correct option out of the options given below:
(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 reason is not the correct explanation of the assertion.
(c)If assertion is true but reason is false.
(d)If assertion is false but reason is true.

Assertion: Phenol is more reactive than benzene towards electrophilic substitution reaction.
Reason : In the case of phenol, the intermediate phenoxide is more resonance stabilized.

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Reason: A unique line passes through a single point.
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