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  • Using the standard electrode potential, find out the pair between which redox reaction is not feasible.

Using the standard electrode potential, find out the pair between which redox reaction is not feasible.

E^{}\Theta values: Fe^{3+}/Fe^{2+} =0.77;I_{2}/I^{-}=+0.54;

                    Cu^{2+}/Cu=0.34;Ag^{+}/Ag=+0.80V


(i) Fe^{3+} and \;I^{-}
(ii) Ag^{+} and \;Cu
(iii) Fe^{3+} and \;Cu
(iv) Ag \;and \;Fe^{3+}

Answers (1)

 The answer is the option (iv) Ag \;and \;Fe^{3+}

Explanation: To make the reaction feasible, E^{0}cell need to be positive for the pair Ag and Fe^{3+}, but it is negative. Hence the reaction is not feasible.

 

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