The method of zone refining of metals is based on the principle of
A. greater mobility of pure metal than that of the impurity.
B. higher m.pt. of the impurity than that of the pure metal.
C. greater noble character of the solid metal than that of the impurity
D. greater solubility of the impurity in the molten state than in the solid.
Answer:D
The method of zone refining of metals is based on the principle of
A. greater mobility of pure metal than that of the impurity. B. higher m.pt. of the impurity than that of the pure metal. C. greater noble character of the solid metal than that of the impurity D. greater solubility of the impurity in the molten state than in the solid.