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Given that the standard electrode (E^(@)...

Given that the standard electrode` (E^(@))` of metals are :
`K^(+)//K=- 2.93 V, Ag^(+)//Ag = 0.80 V, Cu^(2+)//Cu = 0. 34 V, `
` Mg^(2+)//Mg =- 2.37 V, Cr^(3+)// Cr =- 0.74 V, Fe^(2+)//Fe =- 0.44 V`.
Arrange these metals in an increasing order of their reducing power.
Or
Two half -reactions of an electrochemical cell are given below :
`MnO_4^(-)`(aq) + 8 `H^(+)` (aq) + 5 `e^(-)` `rarr``Mn^(2+)` (aq) + 4 `H_(2) O` (l) , `E^(@)` = + 1.51 V,
` Sn^(2+) (aq) to Sn^(4+) (aq) + 2e^(-) , E^(@) = + 0.15^(V)` construct redox equation and predict if the reaction is reactant or product favoured.

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