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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^(0)` is + 0.96 V , the values of `E^(0)` for some metal ions ar given below :
` i) V_((aq))^(+2) + 2e^(-) to V, E^(0) = 1.19V `
`ii) Fe_((aq))^(+3) + 3e^(-) to Fe , E^(0) = -0.04 V `
`iii) Au_((aq))^(+3) + 3e^(-) to Au , E^(0) = + 1.40 V `
`iv) Hg_((aq))^(+2) + 2e^(-) to Hg , E^(0) = +0.86 V `
The pair(s) of metals that is/are oxidizd by `NO_3^(-)` in aqueous solution is /are

A

Fe and Au

B

Hg and Fe

C

V and Hg

D

Fe and V

Text Solution

Verified by Experts

The correct Answer is:
B, C, D
`V^(+2)//V(-1.19V) , Fe^(+3)//Fe-(0.04V),Hg^(+2)//Hg (+0.86V) , NO_3^(-) // NO_2^(-) (+0.9V) ,Au^(+3)//Au (+1.40)`
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