Purest form of commercial iron is :

Options

A. Steel
B. Wrought iron
C. Grey cast iron
D. White cast iron

Answer

B

Explanation

Grey cast iron and white cast iron contain 2.4 to 4.5% carbon together with some sulphur , phosphorus , silicon and manganese . Steel contain 0.4 to 1.5% impurities while wrought iron contain not more than 0.5% of carbon and other impurities . Therefore , wrought iron is the purest form of iron.