The reaction: occurs in the galvanic cell — Electrochemistry Chemistry Question

💡 Solution & Explanation

The oxidation half-reaction is $H_2 \rightarrow 2H^+ + 2e^-$, representing a standard hydrogen-like electrode: $Pt \| H_2(g) \| H^+(aq)$. The reduction half-reaction is $2AgCl(s) + 2e^- \rightarrow 2Ag(s) + 2Cl^-$, representing a metal-insoluble salt electrode: $Cl^- \| AgCl(s) \| Ag$. Combining these gives $Pt \| H_2(g) \| HCl(aq) \| AgCl(s) \| Ag$. Therefore, correct answer is C.