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B
2.46 V
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C
0.56 V
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D
-0.56 V
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Solution
The correct option is D 1.23 V According to given values, Mn3++e→Mn2+−ΔGo1=1×1.51×F Mn4++e→Mn3+−ΔGo2=1×0.95×F by adding these equations, Mn4++2e→Mn2+;−(ΔGo1+ΔGo2)=(1.51+0.95)×F So for this equation,