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

${\mathrm{AsO}}_3^{3-}+{\mathrm{IO}}_3^{-} \to {\mathrm{AsO}}_4^{3-}+{\mathrm{I}}^{-}$

 

(Question corrected)

Assign oxidation number to atoms of only those elements which undergo oxidation number change in the following redox reactions, and then balance the equations.

${\mathrm{Fe}}_3{\mathrm{O}}_4+{\mathrm{MnO}}_4^{-}+{\mathrm{H}}_2\mathrm{O}\to {\mathrm{Fe}}_2{\mathrm{O}}_3+{\mathrm{MnO}}_2+{\mathrm{OH}}^{-}$

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

${\mathrm{H}}_2\mathrm{S}+{\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}+{\mathrm{H}}^{+}\to {\mathrm{Cr}}^{3+}+{\mathrm{S}}_8+{\mathrm{H}}_2\mathrm{O}$

Assign oxidation number to atoms of only those elements which undergo oxidation number change in the following redox reactions, and then balance the equations.

$\mathrm{ZnS}+{\mathrm{O}}_2\to \mathrm{ZnO}+{\mathrm{SO}}_2$

Assign oxidation number to atoms of only those elements which undergo oxidation number change in the following redox reactions, and then balance the equations.

${\mathrm{KNO}}_3+{\mathrm{FeSO}}_4+{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{KHSO}}_4+{\mathrm{Fe}}_2{\left({\mathrm{SO}}_4\right)}_3+\mathrm{NO}+{\mathrm{H}}_2\mathrm{O}$

Assign oxidation number to atoms of only those elements which undergo oxidation number change in the following redox reactions, and then balance the equations.

${\mathrm{H}}_2\mathrm{S}+{\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7+{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{KHSO}}_4+{\mathrm{Cr}}_2{\left({\mathrm{SO}}_4\right)}_3+\mathrm{S}+{\mathrm{H}}_2\mathrm{O}$

Assign oxidation number to atoms of only those elements which undergo oxidation number change in the following redox reactions, and then balance the equations.

$\mathrm{KI}+{\mathrm{H}}_2{\mathrm{SO}}_4 \to {\mathrm{KHSO}}_4+{\mathrm{SO}}_2+{\mathrm{I}}_2+{\mathrm{H}}_2\mathrm{O}$

Assign oxidation number to atoms of only those elements which undergo an oxidation number change in the following redox reactions, and then balance the equations.

${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}+{\mathrm{MnO}}_4^{-}+{\mathrm{OH}}^{-}\to {\mathrm{C}}_2{\mathrm{H}}_3{\mathrm{O}}^{-}+{\mathrm{MnO}}_2+{\mathrm{H}}_2\mathrm{O}$

Assign oxidation number to atoms of only those elements which undergo oxidation number change in the following redox reactions and then balance the equations.

$\mathrm{Al}+{\mathrm{KMnO}}_4+{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{KHSO}}_4+{\mathrm{Al}}_2{\left({\mathrm{SO}}_4\right)}_3+{\mathrm{MnSO}}_4+{\mathrm{H}}_2\mathrm{O}$