∵ΔG∘=−nFE∘ Option (1)E∘=0.8+0.76=1.56 V∴ΔG∘=−2×F×1.56=−3.12 V Option (2) E∘=−2.37+0.76=−1.61 V∴ΔG∘=−2×F×(−1.61)=+3.22 V Option (3) E∘=−2.37−0.8=−3.17 VΔG∘=−2)×F×(−3.17)=+6.34 Option (4)E∘=0.8−0.34=0.46 VΔG∘=−2×F×0.46=−0.92 V
Standard electrode potentials for a few half cells are mentioned below : $\begin{aligned}
& \mathrm{E}{\mathrm{Cu}^{2+} / \mathrm{Cu}}^{\circ}=0.34 \mathrm{~V}, \mathrm{E}{\mathrm{Zn}^{2+} / \mathrm{Zn}}^{\circ}=-0.76 \mathrm{V} \
& \mathrm{E}_{\mathrm{Ag}^{+} / \mathrm{Ag}}^{\circ}=0.80 \mathrm{V}, \mathrm{E}_{\mathrm{Mg}^{2+} / \mathrm{Mg}}^{\circ}=-2.37 \mathrm{~V}
\end{aligned}Whichoneofthefollowingcellsgivesthemostnegativevalueof\Delta \mathrm{G}^{\circ}$ ?
Held on 23 Jan 2025 · Verified 6 Jul 2026.
ZnZn2+(1M)Ag+(1M)Ag
ZnZn2+(1M)Mg2+(1M)Mg
AgAg+(1M)Mg2+(1M)Mg
CuCu2+(1M)∥Ag+(1M)Ag
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