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Electrolytic Refining of Copper

Impure metal ...

Question

Impure metal forms a volatile compound (X) with CO then on heating (X) gives pure metal.

The Metal is :

A

Cu

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B

Fe

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C

Ni

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D

Pt

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Solution

The correct option is C Ni
Reaction:
$N i + 4 C O \to N i (C O)_{4} h e a t - - \to N i + 4 C O$

The process is known as Mond Process.

So, the correct option is (C)

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