Question

On which electrode is hydrogen obtained during electrolysis?

Answer 1

1. During electrolysis, hydrogen is obtained at the cathode.
2. For example when an electric current passes through aq. ${\mathrm{H}}_2{\mathrm{SO}}_4$ it ionises into constituent ions. ${\mathrm{H}}^{+}$ obtained at the cathode and ${{\mathrm{SO}}_4}^{2-}$ at the anode.

${\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)\stackrel{\mathrm{Electricity}}{\rightleftharpoons }\underset{\mathrm{At}\mathrm{cathode}}{2{\mathrm{H}}^{+}}+\underset{\mathrm{At}\mathrm{anode}}{{{\mathrm{SO}}_4}^{2-}}$