Describe a method for refining nickel. – InterviewSolution

1.	Describe a method for refining nickel.
Answer» When impure nickel is heated in a current of CO at 330 – 350 K, it forms volatile nickel tetracarbonyl leaving behind the impurities. The nickel tetracarbonyl thus obtained is then heated to a higher temperature (450 - 470 K), when it undergoes thermal decomposition to give pure nickel.

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