Chemistry - Redox Reactions Question with Solution | TestHub

$$\begin{array}{rl}& :{\mathrm{IO}}_3^{-}+a{\mathrm{I}}^{-}+b{\mathrm{H}}^{+}\to c{\mathrm{H}}_2\mathrm{O}+d{\mathrm{I}}_2\\ & \text{ Step }1:{\mathrm{I}}^{-}\to {\mathrm{I}}_2\text{ (oxidation) }\\ & {\mathrm{IO}}_3^{-}\to {\mathrm{I}}_2\text{ (reduction) }\\ & \text{ Step }2:2{\mathrm{IO}}_3^{-}+12{\mathrm{H}}^{+}\to {\mathrm{I}}_2+6{\mathrm{H}}_2\mathrm{O}\\ & \text{ Step }3:2{\mathrm{IO}}_3^{-}+12{\mathrm{H}}^{+}+10e^{-}\to {\mathrm{I}}_2+6{\mathrm{H}}_2\mathrm{O}\\ & 2{\mathrm{I}}^{-}\to {\mathrm{I}}_2+2e^{-}\\ & \text{Step }4:2{\mathrm{IO}}_3^{-}+12{\mathrm{H}}^{+}+10e^{-}\to {\mathrm{I}}_2+6{\mathrm{H}}_2\mathrm{O}\\ & \left[2{\mathrm{I}}^{-}\to {\mathrm{I}}_2+2e\right]\times 5\end{array}$$ $$\begin{array}{rl}& \text{ Step }5:2{\mathrm{IO}}_3^{-}+10{\mathrm{I}}^{-}+12{\mathrm{H}}^{+}\to 6{\mathrm{I}}_2+6{\mathrm{H}}_2\mathrm{O}\\ & {\mathrm{IO}}_3^{-}+5{\mathrm{I}}^{-}+6{\mathrm{H}}^{+}\to 3{\mathrm{I}}_2+3{\mathrm{H}}_2\mathrm{O}\end{array}$$ On comparing, $a=5,b=6,c=3,d=3$.