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Question

Impure Ni+4CO60−80oC−−−−−→Ni(CO)41800C−−−→Ni+4CO
The above process of purification of the metal is known as:

A
van arkel process
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B
pyrometallurgy
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C
mond process
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D
zone refining
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Solution

The correct option is B mond process
Mond Process for Refining Nickel: In this process, nickel is heated in a stream of carbon monoxide forming a volatile complex named as nickel tetracarbonyl. This complex is decomposed at a higher temperature to obtain the pure metal.
The reactions are:
Ni+4CONi(CO)4
Ni(CO)4Ni+4CO

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