It is observed that $Pb^{2+}$ is more stable than $Pb^{4+}$,while $Sn^{2+}$ is less stable than $Sn^{4+}$. Consider the following reactions:
$PbO_{2} + Pb \rightarrow 2PbO; \Delta_{r}G^{\circ} (1)$
$SnO_{2} + Sn \rightarrow 2SnO; \Delta_{r}G^{\circ} (2)$
Identify the correct set from the following.

  • A
    $\Delta_{r}G^{\circ}(1) > 0; \Delta_{r}G^{\circ}(2) < 0$
  • B
    $\Delta_{r}G^{\circ}(1) < 0; \Delta_{r}G^{\circ}(2) < 0$
  • C
    $\Delta_{r}G^{\circ}(1) < 0; \Delta_{r}G^{\circ}(2) > 0$
  • D
    $\Delta_{r}G^{\circ}(1) > 0; \Delta_{r}G^{\circ}(2) > 0$

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