Van Arkel method is used for refining

Options

A. lead
B. zinc
C. copper
D. zirconium

Explanation

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

1. **Understanding the Van Arkel Method**: The Van Arkel method is a chemical process used for the refining of certain metals, particularly zirconium.

2. **Initial Reaction**: In this method, impure zirconium (Zr) is heated in the presence of iodine (I2). This reaction occurs at a temperature of approximately 523 Kelvin.

3. **Formation of Zirconium Iodide**: The reaction between zirconium and iodine produces zirconium tetraiodide (ZrI4) in gaseous form. This step is crucial as it helps in removing impurities such as oxygen and nitrogen.

4. **Decomposition of Zirconium Iodide**: The zirconium tetraiodide (ZrI4) is unstable and can be further heated to a higher temperature, around 800 Kelvin.

5. **Final Products**: Upon heating, ZrI4 decomposes back into pure zirconium (Zr) and iodine gas (I2). The iodine gas can be released, leaving behind pure zirconium.

6. **Conclusion**: Therefore, the Van Arkel method is specifically used for the refining of zirconium.

**Final Answer**: The Van Arkel method is used for refining zirconium.

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