JEE Main · 2023 · 24 Jan 2023 · Shift 2 · Compounds Containing Nitrogen

Choose the correct colour of the product for the following reaction.

(A)Yellow
(B)White
(C)Red✓ Correct
(D)Blue

Answer: (C)

Solution

The diazonium species of sulphanilic acid couples with 1-naphthyl amine at the position next to the amino group, joining the two rings through an azo

(- N = N -)

bridge. The extended conjugation of this azo dye absorbs in the visible region, and the coupled product separates as a red solid. The colour of the product is red.

JEE Main · 2023 · 24 Jan 2023 · Shift 2 · Single correct option

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