The purest form of iron is

Options

A. Wrought Iron
B. Steel
C. Cast iron
D. Stainless Steel

Explanation

**Step-by-Step Text Solution:**

1. **Identify the Question**: The question asks for the purest form of iron.

2. **Understanding Iron Forms**: There are different forms of iron, including cast iron, wrought iron, and pig iron. Each has varying levels of impurities, primarily carbon content.

3. **Determine the Purest Form**: Among these forms, wrought iron is recognized as the purest form of iron.

4. **Carbon Content in Wrought Iron**: Wrought iron contains a very low percentage of carbon, typically between 0.12% to 0.25%. This low carbon content is what makes it the purest form.

5. **Production of Wrought Iron**: Wrought iron is produced from cast iron. The process involves heating cast iron in a furnace that is lined with hematite ore (Fe2O3).

6. **Chemical Reaction**: During this heating process, the carbon present in cast iron reacts with the hematite ore. This reaction results in the formation of wrought iron and releases carbon monoxide gas.

7. **Conclusion**: Therefore, the purest form of iron is wrought iron.

**Final Answer**: The purest form of iron is wrought iron.

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