JEE Main 2026 — Jan 23, Shift 2 — Chemistry solution

JEE Main2026Jan 23, Shift 2Chemistry

Given below are two statements:

Statement I :

can be synthesized from using simpler reagents in the order i) Acidic $K M n O_{4}$ , ii) Ammonia, iii) Bromine and alkali.

Statement II : can be converted into using reagents in the order (i) Bromine- $H_{2} O$ (ii) $N a N O_{2} / H C l$ (0-5 °C) (iii) aq. $H_{3} P O_{2}$ .

In the light of the above statements, choose the correct answer from the options given below

A
Both Statement I and Statement II are false
B
Statement I is true but Statement II is false
C
Both Statement I and Statement II are true
D
Statement I is false but Statement II is true

Solution

Statement I:

(i) Acidic $K M n O_{4}$ oxidises both propyl side chains on the benzene ring to $- C O O H$ , giving phthalic acid (benzene-1,2-dicarboxylic acid).

(ii) $N H_{3}$ converts the diacid to phthalimide / phthalamide.

(iii) $B r_{2} + K O H$ effects the Hofmann bromamide rearrangement on the two amide groups, replacing $- C O N H_{2}$ with $- N H_{2}$ at each position, giving benzene-1,2-diamine. True.

Statement II:

(i) $B r_{2} / H_{2} O$ on p-toluidine activates ring through $- N H_{2}$ ; bromination occurs at the positions ortho to the amine and meta to the methyl, giving 2,6-dibromo-4-methylaniline.

(ii) Diazotisation with $N a N O_{2} / H C l$ at $0$ - $5^{\circ} C$ converts $- N H_{2}$ to the diazonium salt.

(iii) Reduction with aq. $H_{3} P O_{2}$ replaces $- N_{2}^{+}$ with $- H$ , leaving 3,5-dibromotoluene. True.

Both statements are true.

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