Q.

Statement I : Surface of a metal acts like an electrochemical cellStatement II : Oxygen concentration on the surface a metal is not uniform

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Statement I and II are correct

Statement I is correct and Statement II is incorrect

Statement - I is incorrect and Statement - II is correct

Both statement - I and II are incorrect

answer is A.

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Detailed Solution

On the surface of a metal concentration of oxygen is different.Region where the [O2] is low acts as anode.Region where the [O2] is high acts as cathode.On surface both oxidation and reductioin occur simultaneously.Surface of a metal acts like an electrochemical cell.

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