For the reduction of `NO_(3)^(-)` ion in an aqueous solution `E^(@)` is `+0.96V`. Value of `E^(@)` for some metal ions are given below `V^(2+)(aq)+2e^
For the reduction of `NO_(3)^(-)` ion in an aqueous solution `E^(@)` is `+0.96V`. Value of `E^(@)` for some metal ions are given below
`V^(2+)(aq)+2e^(-)rarrV E^(@)=-1.19V`
`Fe^(3+)(aq)+3e^(-)rarrFe E^(@)=-0.04V`
`Au^(3+)(aq)+3e^(-)rarrAu E^(@)=+1.40V`
`Hg^(2+)(aq)+2e^(-)rarrHg E^(@)=+0.86V`
The pair(s) of metal that is/are oxidised by `NO_(3)^(-)` in aqueous solution is(arE):
A. V and Hg
B. Hg and Fe
C. Fe and Au
D. Fe and V
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Correct Answer - A::B::D
`E_(M^(n+)//M)^(@)` for V, Fe and Hg are lower than that of `NO_(3)^(-)`, so, `NO_(3)^(-)` will oxidise V, Fe and Hg.
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