Identify representation of standard hydrogen electrode?

1. $\mathrm{H}_{\mathrm{aq}}^{+}\left|\begin{array}{l}\mathrm{H}_2 \\ 1_{\mathrm{M}}\end{array}\right| \mathrm{Pt},\left[\mathrm{H}^{+}\right]$
2. $\mathrm{H}^{+}(1 \mathrm{M})\left|\mathrm{H}_2(\mathrm{~g}) 1 \mathrm{~atm}\right| \mathrm{Pt}$
3. $\mathrm{H}_{2(\mathrm{~g})}\left|\mathrm{H}_{\mathrm{aq}}^{+}\right| \mathrm{Pt}, \mathrm{H}^{+}$
4. $\mathrm{Pt},\left[\mathrm{H}^{+}\right] \mathrm{H}_2 \mathrm{~g}_{\mathrm{g})} \mathrm{P}_2\left|\mathrm{H}^{+}\right| \mathrm{H}^{+}(1 \mathrm{~m})$

Solution

Asked in: MHT CET 2022 (08 Aug Shift 2)

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