$E_{M n^{2}+/ M n}^{\circ}=-1.18 V$
$E_{C r^{2}+/ C r}^{\circ}=-0.9 V$
$E_{F e^{2+} / F e}^{\circ}=-0.44 V$ and
$E_{C o^{2}+/ C o}^{\circ}=-0.28 V$
The correct order of $E_{M^{2+} / M}^{\circ}$ values without
considering negative sign would be
$M n^{2+}>C r^{2+}>F e^{2+}>C o^{2+}$
$Zn | Zn ^{2+}(0.1\, M ) \| Ag ^{+}(0.01 \,M )| Ag$
[આપેલ $: E_{Z n^{+2}/Z_{n}}^{0}=-0.76 \,V ; E _{A g^{+} / A_{ g }}^{0}=+0.80 \,V ; \frac{2.303 RT }{ F }=0.059$]
$2AgCl(s) + H_2(g) \rightarrow 2Ag(s) + 2H^{+} + 2Cl^{-}$ એ $G^o$ કેટલો થશે?