Which is the purest form of iron?
(1) Steel
(2) Cast iron
(3) Pig iron
(4) Wrought iron
Answer: (4) Iron is a chemical element with the symbol Fe and atomic number 26. It is a metal in the first transition series. It is the most common element (by mass) forming the planet Earth as a whole, forming much of Earth’s outer and inner core. It is the fourth most common element in the Earth’s crust. Wrought iron is the purest form of iron. It contains less than 0.25% carbon.
