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Q.

Floating zone process is used for the purification of :

 A.

Germanium

 B.

Argon

 C.

Aluminium

 D.

Copper

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Solution:
Option(A) is correct

Zone melting (or zone refining or floating zone process) is a group of similar methods of purifying crystals like Germanium in which a narrow region of a crystal is molten, and this molten zone is moved along the crystal.

The molten region melts impure solid at its forward edge and leaves a wake of purer material solidified behind it as it moves through the ingot.

The impurities concentrate in the melt, and are moved to one end of the ingot.


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