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AIIMS2017ChemistryElectrochemistry

On the basis of standard electrode potential of redox couples given below, find out which of the following is the strongest oxidising agent. (E^ . values : Fe ³⁺ | Fe ²⁺=+0.77 ~V ; I _ 2(s) | I ⁻= .+0.54 ~V ; Cu ²⁺ | Cu =+0.34 ~V ; Ag ⁺ | Ag =+0.80 ~V )

Options

  1. AFe ³⁺
  2. BI _ 2(s)
  3. CCu ²⁺
  4. DAg ⁺

Correct answer

D. Ag ⁺

Step-by-step solution

Higher the electrode potential, better is the oxidising agent. Since, the electrode potential decreases in the order : Ag ⁺ | Ag (+0.80 ~V )> Fe ³⁺ | Fe ²⁺(+0.77 ~V )> I _ 2(s) | I ⁻(+0.54 ~V )> Cu ²⁺ | Cu (+0.34 ~V ) Hence, Ag ⁺ is the strongest oxidising agent.

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