Assigning $\mathrm{ON}$ (Oxidation number) to the atoms of only those elements which undergo change in $\mathrm{ON}$ in the following redox reactions and then balance the equations.

${\mathrm{H}}_2{\mathrm{O}}_2+{\mathrm{ClO}}_2+{\mathrm{OH}}^{-}\to {\mathrm{ClO}}_2^{-}+{\mathrm{O}}_2+{\mathrm{H}}_2\mathrm{O}$

Assigning $\mathrm{ON}$ (Oxidation number) to the atoms of only those elements which undergo change in $\mathrm{ON}$ in the following redox reactions and then balance the equations.

${\mathrm{ClO}}^{-}+{\mathrm{CrO}}_2^{-}+{\mathrm{OH}}^{-}\to {\mathrm{Cl}}^{-}+{\mathrm{CrO}}_4^{2-}+{\mathrm{H}}_2\mathrm{O}$

Assigning $\mathrm{ON}$ (Oxidation number) to the atoms of only those elements which undergo change in $\mathrm{ON}$ in the following redox reactions and then balance the equations.

${\mathrm{I}}_2+{\mathrm{Cl}}_2+{\mathrm{H}}_2\mathrm{O}\to {\mathrm{HIO}}_3+\mathrm{HCl}$

Assigning $\mathrm{ON}$ (Oxidation number) to the atoms of only those elements which undergo change in $\mathrm{ON}$ in the following redox reactions and then balance the equations.

${\mathrm{Cl}}_2+\mathrm{KOH}\to \mathrm{KOCl}+\mathrm{KCl}+{\mathrm{H}}_2\mathrm{O}$

Assigning $\mathrm{ON}$ (Oxidation number) to the atoms of only those elements which undergo change in $\mathrm{ON}$ in the following redox reactions and then balance the equations.

${\mathrm{Cl}}_2+\mathrm{KOH}\to {\mathrm{KClO}}_3+\mathrm{KCl}+{\mathrm{H}}_2\mathrm{O}$

Assigning $\mathrm{ON}$ (oxidation number) to the atoms of only those elements which undergo change in $\mathrm{ON}$ in the following redox reactions and then balance the equations.

${\mathrm{H}}_2{\mathrm{O}}_2+{\mathrm{I}}_2\to {\mathrm{HIO}}_3+{\mathrm{H}}_2\mathrm{O}$

Assigning $\mathrm{ON}$ (Oxidation number) to the atoms of only those elements which undergo change in $\mathrm{ON}$ in the following redox reactions and then balance the equations.

${\mathrm{H}}_2{\mathrm{O}}_2+{\mathrm{KMnO}}_4\to {\mathrm{MnO}}_2+\mathrm{KOH}+{\mathrm{O}}_2+{\mathrm{H}}_2\mathrm{O}$

Assign $\mathrm{ON}$ to atoms of only those elements which undergo $\mathrm{ON}$ change in the following redox reactions, and then balance the equations.

${\mathrm{HNO}}_2+{\mathrm{KMnO}}_4+{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{HNO}}_3+{\mathrm{MnSO}}_4+{\mathrm{K}}_2{\mathrm{SO}}_4+{\mathrm{H}}_2\mathrm{O}$

Assign $\mathrm{ON}$ to atoms of only those elements which undergo $\mathrm{ON}$ change in the following redox reactions, and then balance the equations.

${\mathrm{NaNO}}_2+\mathrm{NaI}+{\mathrm{H}}_2{\mathrm{SO}}_4\to \mathrm{NO}+{\mathrm{I}}_2+{\mathrm{Na}}_2{\mathrm{SO}}_4+{\mathrm{H}}_2\mathrm{O}$