Iron is coated with two metals A and B separately. When the coating is partially worn away, it is still proctected when coated with A and not by B. Explain with reference to electrochemical series.

Iron is coated with two metals A and B separately. When the coating is

1.	Iron is coated with two metals A and B separately. When the coating is partially worn away, it is still proctected when coated with A and not by B. Explain with reference to electrochemical series.
Answer» SOLUTION :(i) Comparison of electropositivity of A, B and Fe. (ii) Comparison of standard reduction potential of A, B and iron. (iii) Relation between standard reduction potential of an ELEMENT and the tendency of GETTING oxidised. (iv) Relation between the tendency of a metal to get oxidised and its ABILITY to protect iron from corrosion