Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Experimental reaction of $\mathrm{CH}_{3} \mathrm{Cl}$ with aniline and anhydrous $\mathrm{AlCl}_{3}$ does not give o and p-methylaniline. Reason (R) : The $-\mathrm{NH}_{2}$ group of aniline becomes deactivating because of salt formation with anhydrous $\mathrm{AlCl}_{3}$ and hence yields $m$-methyl aniline as the product. In the light of the above statements, choose the most appropriate answer from the options given below:

(C) (A) is true, but (R) is false.

(A) Both (A) and (R) are true and (R) is the correct explanation of (A).

(B) Both (A) and (R) are true but (R) is not the correct explanation of (A).

(D) (A) is false, but (R) is true.

JEE Main · 2022 · 26 Jul 2022 · Shift 1 · Hydrocarbons

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Experimental reaction of

CH_{3} Cl

with aniline and anhydrous

AlCl_{3}

does not give o and p-methylaniline.

Reason (R) : The

- NH_{2}

group of aniline becomes deactivating because of salt formation with anhydrous

AlCl_{3}

and hence yields

m

-methyl aniline as the product.

In the light of the above statements, choose the most appropriate answer from the options given below:

(A)Both (A) and (R) are true and (R) is the correct explanation of (A).
(B)Both (A) and (R) are true but (R) is not the correct explanation of (A).
(C)(A) is true, but (R) is false.✓ Correct
(D)(A) is false, but (R) is true.

Answer: (C)

Solution

Assertion (A) is true: the Friedel-Crafts alkylation does not occur with aniline in the presence of AlCl₃. Reason (R) is false: while the –NH₂ group does form a salt with AlCl₃ (making it a deactivating –NH₃⁺ group), the reaction does NOT yield m-methyl aniline. Instead, the Friedel-Crafts reaction does not proceed at all on the deactivated ring. Therefore, option (C) is correct.

JEE Main · 2022 · 26 Jul 2022 · Shift 1 · Single correct option

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JEE Main · 2022 · 26 Jul 2022 · Shift 1 · Hydrocarbons

Solution

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