JEE Main · 2025 · 03 Apr 2025 · Shift 1 · Compounds Containing Nitrogen

In the following reactions, which one is NOT correct?

(A)(see structure)
✓ Correct
(B)(see structure)
(C)(see structure)
(D)(see structure)

Answer: (A)

Solution

Benzenediazonium chloride with potassium iodide gives iodobenzene, with hypophosphorous acid and water gives benzene, and with

CuCN/KCN

gives benzonitrile, all genuine replacements of the diazonium group. With ethanol the group is not replaced by an ethoxy group; ethanol instead acts as a reducing agent, the diazonium leaving as nitrogen to give benzene (together with acetaldehyde). The transformation drawn as making ethoxybenzene from the diazonium salt and ethanol is the one that is not correct.

JEE Main · 2025 · 03 Apr 2025 · Shift 1 · Single correct option

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