Chemistry (M.Phil./Ph.D.) 2021 Panjab University Entrance Exam With Answers

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30.

In view of the signs of ΔrG° for the following reactions

PbO2 + Pb → 2 PbO, ΔrG° < 0
SnO2 + Sn → 2 SnO, ΔrG° > 0,
Which oxidation states are more characteristic for lead and tin?
A: +2 for Pb, +4 for Sn
B: +4 for Pb, +2 for Sn
C: +2 for Pb, +2 for Sn
D: +4 for Pb, +4 for Sn

The answer is: A

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