Is it easier to take out a nucleon (a) from carbon or from iron (b) from iron or from lead?

Iron burns in air to from

How is cas iron different from pig iron ?

How do plants obtain iron from soil?

Wrought iron is the purest form of iron. Write a reation used for the preparation of wrought iron from cast iron. How can the impurities of sulphur, silicon and phosphorus be removed from cast iron?