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

Explanation

Vapour phase refining : It is a refining method in which the metal is converted into its volatile compound and collected elsewhere. It is then decomposed to give pure metal.
Example : Mond's Process for refining of Nickel/Van Arkel method for refining of Zirconium
Equations involved :
`Ni+4COoverset(330-350)toNi(CO)_(4)`
`Ni(CO)_(4)overset(450-470K)toNi+4CO`