\(2{I^ - } \to {I_2}\)
\(P{b^{ + 2}} \to \) Lowest oxidation state can not oxidise iodide to \({I_2}\).
$Fe\, + \,{H_2}O\, \to \,F{e_3}{O_4}\, + \,{H_2}$
$S{O_2}\, + \,\,2{H_2}S\,\,\, \to \,\,3S\,\, + \,\,2{H_2}O$
$2KMn{O_4}\,\,\, + \,\,\,\,2KOH\,\,\,\,\,\,\, \to \,\,\,\,\,2{K_2}Mn{O_4}\,\,\, + \,\,\,{H_2}O\,\,\, + \,\,\,O$ તો $KMnO_4$ નો તુલ્યભાર કેટલો થાય ?
(પ.ભાર : $K = 39, Mn = 55, O = 16$)