\(2{I^ - } \to {I_2}\)
\(P{b^{ + 2}} \to \) Lowest oxidation state can not oxidise iodide to \({I_2}\).
વિધાન $II$: $\mathrm{ClO}_4^{-}$એ એસીડીક પરિસ્થિતિમાં વિષમીકરણ પામે છે. તો યોગ્ય વિકલ્પ પસંદ કરો.
${H_2}{O_2}\xrightarrow{{R.T}}{H_2}O + \frac{1}{2}{O_2}$
$Fe\, + \,{H_2}O\, \to \,F{e_3}{O_4}\, + \,{H_2}$
$I.{\text{ }}2Cs{\text{ }} + {\text{ }}2{H_2}O{\text{ }} \to {\text{ 2}}CsOH{\text{ }} + {\text{ }}{H_2}$
$II.{\text{ }}2Cu{I_2} \to 2CuI + {\text{ }}{I_2}$
$III.{\text{ }}N{H_4}Br + {\text{ }}KOH \to KBr{\text{ }} + {\text{ }}N{H_3} + {\text{ }}{H_2}O$
$IV.{\text{ }}4KCN{\text{ }} + {\text{ }}Fe{\left( {CN} \right)_2} \to {K_4}\left[ {Fe{{\left( {CN} \right)}_6}} \right]$