1.

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

Answer»

FE and AU
Hg and Fe
V and Hg
Fe and V

SOLUTION :`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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