What is meant by Vapour phase refining? Write any one example of the process which illustrates this technique, giving the chemical equations involved.

Explanation

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

1. **Definition of Vapour Phase Refining:**
Vapour phase refining is a purification technique used to extract and refine metals. In this method, the metal is first converted into a volatile compound. This compound is then collected and subsequently decomposed to yield the pure metal.

2. **Process Explanation:**
- The metal is reacted with a suitable reagent to form a volatile compound.
- This volatile compound is then separated from the reaction mixture.
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