Reduction potential of two metals `M_(1)` and `M_(2)` are `E_(M_(1)^(2+)|M_(1))^(@)=-2.3V ` and `E_(M_(1)^(2)|M_(2))^(@)=0.2` V Predict which one is better for coating the surface of iron. Given `E_(Fe^(2+)|Fe)^(@) = 0.044V `

Explanation

oxidation potential of `M_(1)` is more +ve than the oxidation potential of Fe which indicates that it will prevent iron from rusting.