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Purest form of commercial iron is :A. SteelB. Wrought ironC. Grey cast ironD. White cast iron

Answer» Correct Answer - B
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.


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