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For the reduction of NO ₃⁻ ion in an aqueous solution E^ is +0.96 ~V . Values of E^ for some metal ions are given below. aligned & V ²⁺(a q)+2 e⁻ V ; E^ =-1.19 ~V & Fe ³⁺(a q)+3 e⁻ Fe ; E ^ =-0.04 ~V & Au ³⁺(a q)+3 e⁻ Au ; E^ =+1.40 ~V aligned Hg ²⁺(a q)+2 e⁻ Hg ; E^ =+0.86 ~V The pair(s) of metals that is (are) oxidised by NO ₃⁻ in aqueous solution is (are)

Options

  1. AV and Hg
  2. BHg and Fe
  3. CFe and Au
  4. DFe and V

Correct answer

A. V and Hg

Step-by-step solution

The species having less reduction potential with respect to NO ₃⁻ (E^ =0.96 ~V ) will be oxidised by NO ₃⁻ ; These species are V , Fe , Hg .

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