In which of the following redox pairs, the reduction potential very, with `pH` ?

Options

A. `MnO_(4)^(-)//Mn^(2+)`
B. `AmO_(2)^(2+)//AmO_(2)^(+)`
C. `AmO_(2)^(2+)//Am^(4+)`
D. `Zn^(2+)//Zn`

Answer

A, C

Explanation

The half reaction involve `H^(+)` only in
`4H^(+) + AmO_(2)^(2+) 0+ 2e rarr Am^(4+) + H_(2)O`
`MnO_(4)^(-) + 8H^(+) + 5e rarr Mn^(2+) + 4H_(2)O`