Question

Why iron is transition metal? Which are the three compounds of iron? Write its chemical formula

Answer 1

Iron is a transition metal as it can exists in various oxidation states,  

Or we can say that as iron exists in various oxidation state, iron is known as a transition metal. The compounds of iron are as follows:

Fe₃O₄  

Fe₂O₃

FeO

In these compounds iron exist in +2, +3 oxidation states.