JEE Main 2024 — 8 April, Shift 2 — Question 75

Anodic half cell

$\underline{\text { Gas - gas ion electrode }}$ $\frac{1}{2} \mathrm{H}_{2(\mathrm{~g})} \rightarrow \mathrm{H}_{(a q)}^{+}+\mathrm{e}^{-}$

Cathodic Reaction

Metal-metal insoluble salt anion electrode

$\mathrm{Ag}_{(\mathrm{aq})}^{+}+\mathrm{e}^{-} \rightarrow \mathrm{Ag}_{(\mathrm{s})}$ $\mathrm{AgCl}_{(\mathrm{s})} \rightleftharpoons \mathrm{Ag}_{(\mathrm{aq})}^{+}+\mathrm{Cl}_{(\mathrm{aq})}^{-}$ $\mathrm{AgCl}_{(\mathrm{s})}+\mathrm{e}^{-} \rightarrow \mathrm{Ag}_{(\mathrm{s})}+\mathrm{Cl}_{(\text {(aq) }}^{-}$

Overall redox reaction

$\frac{1}{2} \mathrm{H}_{2(\mathrm{~g})}+\mathrm{AgCl}_{(\mathrm{s})} \rightarrow \mathrm{H}_{(\mathrm{aq})}^{+}+\mathrm{Cl}_{(\mathrm{aq})}^{-}+\mathrm{Ag}_{(\mathrm{s})}$ Cell Representation

$\mathrm{Pt}\left|\mathrm{H}_{2(\mathrm{~g})}\right| \mathrm{kCl}_{\text {(sol) }}\left|\mathrm{AgCl}_{\text {(s) }}\right| \mathrm{Ag}$