Q. The method of zone refining of metals is based on the principle of
A) Greater noble character of the solid metal than that of the impurity
B) Greater solubility of the impurity in the molten state then in the solid
C) Greater mobility of the pure metal than that of impurity
D) Higher malting point of the impurity that of the pure metal
Explanation
(b)
The method of zone refining of metals is based on the principle of greater solubility of the impurity in the molten state than in the solid. Elements which are used as semiconductors like Si, Ge, Ga etc are refined by this method
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.