For the reduction of NO _ 3 ^ - ion in an aqueous solution Eº is + 0.96V. Values of Eº…
Chemistry · JEE Advanced · NTA Exams — Electrochemistry
For the reduction of \(\mathrm{NO}_{3}^{-}\) ion in an aqueous solution Eº is + 0.96V. Values of Eº for some metal ions are given below
V2+ (aq) + 2e–
V Eº = – 1.19V
Fe3+ (aq) + 3e–
Fe Eº = – 0.04 V
Au3+ (aq) + 3e–
Au Eº = + 1.40 V
Hg2+ (aq) + 2e–
Hg Eº = + 0.86V
The pair (s) of metals that is (are) oxidized by \(\mathrm{NO}_{3}^{-}\) in aqueous solution is (are) (2009)
V2+ (aq) + 2e–
V Eº = – 1.19V Fe3+ (aq) + 3e–
Fe Eº = – 0.04 V Au3+ (aq) + 3e–
Au Eº = + 1.40 V Hg2+ (aq) + 2e–
Hg Eº = + 0.86V The pair (s) of metals that is (are) oxidized by \(\mathrm{NO}_{3}^{-}\) in aqueous solution is (are) (2009)
- V and Hg
- Hg and Fe
- Fe and Au
- Fe and V
Answer
(A) V and Hg, (B) Hg and Fe, (D) Fe and V
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