Which is the purest form of iron ?
Correct answer: D. Wrought iron
- A. Grey iron
- B. Pig iron
- C. Bessemer iron
- D. Wrought iron
Explanation
Wrought iron is the purest of these traditional commercial iron forms, containing very little carbon and much less impurity than pig iron or ordinary cast iron. Pig iron is the relatively impure, high-carbon product from the blast furnace.
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