Question

How will you convert the following:
Impure Nickel to pure Nickel

Answer 1

Impure Nickel to pure Nickel is obtained by Mond process in which nickel is heated in a stream of carbon monoxide forming a volatile complex, nickel tetracarbonyl which is subjected to a higher temperature to obtain pure metal.

\[\ce{Ni + 4 CO  ->[330 - 350K]3 Ni (CO)4}\]

\[\ce{Ni (CO)4 ->[450 - 470K] Ni + 4CO}\]