Question

In zone refining method, the molten zone consists of ______.

Options

• impurities only

• pure metal only

• a higher percentage of metal

• a higher percentage of impurities

Answer 1

In zone refining method, the molten zone consists of a higher percentage of impurities.

Explanation:

In the zone refining method, impurities are more soluble in the molten state than in the solid state. As the molten zone moves along the metal rod, impurities concentrate in the molten region and are carried to one end of the rod. Thus, the molten zone always contains a higher percentage of impurities.