1.

In the purification of impure nickel by Mond's process, metal is purified by:

Answer»

Electrolytic reduction
Vapour PHASE thermal DECOMPOSITION
Thermite reduction
Carbon reduction

Solution :`underset(("IMPURE "))(Ni) + 4CO overset(50 ^@" to "60^@ C )tounderset("volatile compound") ( [ Ni (CO)_4uarr]`
` underset(" thermaldecomposition ") overset(200 "to " 230^@ C ) tounderset("pure") ( Ni+ 4CO uarr)`


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