Indicate the principle behind the method used for the refining of Nick – InterviewSolution

1.	Indicate the principle behind the method used for the refining of Nickel.
Answer» Solution :Nickel is heated in a stream of carbon monoxide forming a volatile complex, nickel tetracarbonyl `NI +4CO overset(330-350K) (to) Ni(CO)_(4)` The carbonyl is heated to a HIGHER TEMPERATURE to give BACK the pure metal. `Ni (CO)_(4) overset(450-470 K)(to) Ni +4CO`.

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