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Q. The processes used in the refining of aluminium and zinc metals respectively are

General Principles and Processes of Isolation of Elements

Solution:

Cupellation. This method is applied when the impure metal contains impurities of other metals which form volatile oxides. Distillation process. This method is employed for purification of volatile metals like zinc, mercury, cadmium etc. The impure metal is heated in an iron and the vapours are condensed in separate receivers.