Q.

Ultra purification of a metal is done by

A. slugging
B. zone melting
C. smelting
D. leaching
Answer» B. zone melting
Explanation: When metals are required in a ultra pure state, the zone refining method is used. The principleemployed states that the impurities, which lower the melting point of a metal remain preferentially dissolved in the liquid phase and purer metal will emerge in the solid phase.
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