AIPMT PRELIMS2001Chemistry-Thermodynamics
AIPMT PRELIMS 2001 Chemistry Gibbs Free Energy MCQ Question
Type: MCQ-conceptual-Medium-Class 11
PbO₂ → PbO [ΔG₂₉₈ < 0] , SnO₂ → SnO [ΔG₂₉₈ > 0] Most probable oxidation state of Pb & Sn will be :
A
Pb⁺⁴, Sn⁻²
B
Pb⁺⁴, Sn⁻²
C
Pb²⁺, Sn⁻²
D
Pb²⁺, Sn⁺⁴
Correct Answer
Option D
Detailed Explanation
The negative ΔG for PbO₂ to PbO indicates Pb prefers to be in the +2 oxidation state, while the positive ΔG for SnO₂ to SnO indicates Sn prefers to be in the +4 state.
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