InterviewSolution
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InterviewSolution
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In view of the signs of `Delta_(r)G^(0)` for the following reactions `PbO_(2)+Pbrarr2PbO,Delta_(r)G^(0)lt0` `SnO_(2)+Snrarr2SnO,Delta_(r)G^(0)gt0` Which oxidation state are more characteristic for lead and tin?A. For lead +4, for tin +2B. For lead +2, for tin +2C. For lead +4, for tin +4D. For lead +2, for tin +4 |
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Answer» Correct Answer - D `{:(,PbO_(2),+,Pb,rarr,2PbO),("Oxidation state",+4,,0,,+2):}` Since, `DeltaG^(@) lt 0`, i.e., it is negative. therefore, the reaction is spontaneous in the forward direction. This suggest that `Pb^(2+)` is more stable than `Pb^(4+)` `{:(,SnO_(2),+,Sn,rarr,2SnO),("Oxidation state",+4,,0,,+2):}` Since, `DeltaG^(@) lt 0` i.e., it is positive. Therefore, the reaction is non-spontaneous in the forward direction. but it will spontaneous in the backward direction. This suggests that `Sn^(2+)` is less stable than `Sn^(4+)`. These facts are also supported by the inert pair effect down the group. |
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