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MHT CET202616 April 2026Evening ShiftChemistryHaloalkanes and HaloarenesActual

Identify the reagent used for replacement of - N ₂^+ Cl ^- from benzene diazonium chloride by iodine.

Options

  1. AHI
  2. BKOI
  3. CKI
  4. DPI ₃

Correct answer

C. KI

Step-by-step solution

Benzene diazonium chloride reacts with aqueous potassium iodide (KI) upon warming to form iodobenzene. The reaction is given by: C ₆ H ₅ N ₂^+ Cl ^- + KI C ₆ H ₅ I + N ₂ + KCl Therefore, the reagent used for the replacement of the diazonium group by iodine is KI. Answer: KI

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