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  4. Germanium of very high purity is obtained by

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Q. Germanium of very high purity is obtained by

KEAMKEAM 2012General Principles and Processes of Isolation of Elements

Solution:

Zone-refining is used to obtain metal of very high purity. The principle on which it is based is that an impure molten metal on gradual cooling will deposit its crystals of pure metal, while the impurities will be left in the remaining part of molten metal. Germanium metal can be purified by this method.