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For the reduction of NO(3)^(-) ion in an...

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

Text Solution

Verified by Experts

The correct Answer is:
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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