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In view of the signs of \( \Delta_{\mathrm{r}} \mathrm{G}^{\circ} \) for the following reactions
\[
\mathrm{PbO}_{2}+\mathrm{Pb} \rightarrow 2 \mathrm{PbO}, \Delta_{\mathrm{r}} \mathrm{G}^{\circ}0
\]
\( \mathrm{SnO}_{2}+\mathrm{Sn} \rightarrow 2 \mathrm{SnO}, \Delta_{\mathrm{r}} \mathrm{G}^{\mathrm{o}}0 \)
Which oxidation states are more characteristic for lead and tin?
(a) For lead \( +4 \), for \( \operatorname{tin}+2 \)
(b) For lead \( +2 \), for tin \( +2 \)
(c) For lead \( +4 \), for \( \operatorname{tin}+4 \)
(d) For lead \( +2 \), for \( \operatorname{tin}+4 \)
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