JEE Main 2022 · 28 Jun · Shift 1 · Chemistry Q76

← JEE Main 2022 · 28 Jun · Shift 1

ChemistrySingle correct+4 / -1Question 76 of 90

Identify the major product formed in the following sequence of reactions :

Aniline treated with (1) Br2/H2O, (2) NaNO2/HCl, (3) H3PO2.

Bromobenzene

4-Bromophenylhydrazine

Benzene ring with NH-NH2 and Br para to it.

1,3,5-Tribromobenzene

Benzene ring with Br at positions 1, 3 and 5.

2,4,6-Tribromophenol

Answer and worked solution

Official answer: C

Steps. $\mathrm{Br_2/H_2O}$ : 2,4,6-tribromoaniline. $\mathrm{NaNO_2/HCl}$ : the diazonium salt. $\mathrm{H_3PO_2}$ : replaces $\mathrm{N_2^+}$ by H, giving 1,3,5-tribromobenzene.

(C)

Topics:Diazonium salts Amines

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JEE Main 2022 · 28 Jun · Shift 1, Chemistry question 76