For which of these redox pairs, the reduction potential vary with pH
AmO2+2/AmO+2
AmO2+2/Am4+
MnO−4/Mn2+
Zn2+/Zn
A
AmO2+2/Am4+
B
AmO2+2/AmO+2
C
MnO−4/Mn2+
D
Zn2+/Zn
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Solution
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The half reaction involves H+ only in 4H++AmO2+2+2e→Am4++2H2O and MnO−4+8H++5e→Mn2++4H2O (according to oxygen balance)
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