Chemistry-
General
Easy
Question
Zone refining is a method to obtain
- (a) Very high temperature
- Ultra pure Al
- (c) Ultra pure metals
- Ultra pure oxides
The correct answer is: (c) Ultra pure metals
Zone refining is employed for preparing extremely pure metals.
It is based on the principle that when a molten solution of the impure metal is allowed to cool the pure metal crystallises out while the impurities remain in the melt. Ex : Semiconductors like Si, Ge and Ga are purified by this method.
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