Chemistry - Complete s-block Question with Solution | TestHub

Electrolysis of fused NaOH is carried out at 330^oC using iron as cathode and nickel as anode in Castner’s process as follows
$2\text{NaOH}\to 2{\text{Na}}^{+}+2{\text{OH}}^{-}$
At cathode:$2\mathrm{N}{\mathrm{a}}^{+}+2{\mathrm{e}}^{-}\to 2\mathrm{N}\mathrm{a}$
At anode:$4\mathrm{O}{\mathrm{H}}^{-}\to 2{\mathrm{H}}_2\mathrm{O}+{\mathrm{O}}_2+4{\mathrm{e}}^{-}$