On adding KI to benzenediazonium chloride, the product obtained is

On adding KI to benzenediazonium chloride, the product obtained is
  1. benzene
  2. 1,4-diiodobenzene
  3. iodobenzene
  4. $1,3,5$-triiodobenzene

Solution

When benzene diazonium chloride reacts with potassium iodide, iodobenzene is obtained. Diazonium group is replaced with $-\mathrm{I}$.
$\mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{N}_{2}^{+} \mathrm{Cl}^{-}+\mathrm{KI} \stackrel{\Delta}{\longrightarrow} \mathrm{C}_{6} \mathrm{H}_{5}-\mathrm{I}+\mathrm{N}_{2} \uparrow+\mathrm{KCl}$

Asked in: JEE-TOPICTESTS-CHEMISTRY

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