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Question:

Name the method used for refining of nickel.Name the method used for refining of nickel.?

Solution:

Mond process is used for refining of nickel.Ni is heated in a stream of CO to form volatile nickel tetra carbonyl.This complex is then decomposed at high temperature to give pure nickel.Ni+4CO330−350K−−−−−−→Ni(CO)4Ni(CO)4450−470−−−−−→Ni+4CO