Standard electrode potentials for a few half cells are mentioned below:
\(\mathrm{E}_{\mathrm{Cu}^{2 *} / \mathrm{Cu}}^{\mathrm{o}}=0.34 \mathrm{~V}, \mathrm{E}_{\mathrm{Zn}^{2+} / \mathrm{Zn}}^{\mathrm{o}}=-0.76 \mathrm{~V}\)
\(\mathrm{E}_{\mathrm{Ag}^{+} / \mathrm{Ag}}^{0}=0.80 \mathrm{~V}, \mathrm{E}_{\mathrm{Mg}^{2+} / \mathrm{Mg}}^{0}=-2.37 \mathrm{~V}\)
Which one of the following cells gives the most negative value of ΔGº ?
1
Zn|Zn2+ (1M)||Ag+ (1M)| Ag
2
Zn|Zn2+ (1M)||Mg2+(1M)| Mg
3
Ag|Ag+ (1M)||Mg2+(1M)| Mg
4
Cu|Cu2+ (1M)||Ag+ (1M)| Ag