1.

In view of the signs of Delta_(r)G^(@) for the following reactions: PbO_(2)+Pb to 2PbO,Delta_(r)G^(@) SnO_(2)+S to 2SnO, Delta_(r)G^(@) Which oxidation states are more characteristics for lead and tin?

Answer»

For LEAD +2, For tin +2
For lead +4, for tin +4
For lead +2, For tin +4
For lead +4, For tin +2

Solution :Negative `Delta_(r)G^(@)` value of indicates that +2 oxidation state is more stable for Pb. Also it is supported by inert pair effect that +2 oxidation state is more stable for Pb and as `Delta_(r)G^(@)` value is POSITIVE in second REACTION it indicates that +4 oxidation state is more stable for Sn i.e., `Sn^(2+)ltPb^(2+), S^(4+)gtPb^(4+)`


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