Question

The hydrogen electrode potential depends on:

• A. nature of metal used as anode
• B. the $P^H$ of the solution
• C. both nature of the metal used as anode and
  the $P^H$ of the solution
• D. nature of the metal used as cathode and the
  $P^H$ of the solution

Answer 1

The correct option is D nature of the metal used as cathode and the

$P^H$ of the solution
The standard hydrogen electrode is
$H_2,Pt|H^{+}\left(1M\right)$
$pH=-log\left[H^{+}\right]$
$\therefore$ If the conc. of $H^{+}$ (i.e. pH) of the solution or the metal is changed,
the electrode changes and the hydrogen electrode metal changes.

Hence, option D is correct.