Question

On electrolysis of fused $NaH$, hydrogen gas is produced at which electrode?

Answer 1

1. The ionic compound Sodium hydride($\mathit{N}\mathit{a}\mathit{H}$) decomposes below its melting point.
2. The electrolysis of Sodium hydride produces Sodium in the liquid form and Hydrogen gas.
3. Sodium metal is produced in the Cathode electrode.
4. And the Hydrogen gas is produced in the Anode electrode.
5. The cathodic and anodic reaction happening here is,

Cathode: $2N{a}^{+}+2e^{-}\to \underset{Sodiummetal}{2Na\left(l\right)}$

Anode: $2H^{-}\to \underset{Hydrogengas}{H_2\left(g\right)}+2e^{-}$

So the Hydrogen gas is produced in the Anode.