Question

For the reduction of `NO_(3)^(-)` ion in an aqueous solution `E^(@)` is `+0.96V`. Values of `E^(@)` for some metal ions are given below `V^(2+)(aq)+2e^(-)hArrV,E^(@)=-1.19V t t`
`Fe^(3+)(aq)+3e^(-)rarrFe: E^(@)=-0.04V`
`Au^(3+)(aq)+3e^(-)rarrAu, E^(@)=+1.40V`
`Hg^(2+)(aq)+3e^(-)rarrHg, E^(@)=+0.86V`
The pari(s) of metals 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

Answer 1

Correct Answer - A::D
the species havin less reduction potential with respect to `NO_(3)^(-)(E^(@)=0.96V)` will be oxidised by `NO_(3)^(-)`.