In the zone-refining method,the molten zone:

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(B) Zone-refining is a technique used for the purification of metals. In this process,a narrow region of the metal ingot is melted using a circular mo

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contains more impurity than the original metal

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(B) Zone-refining is a technique used for the purification of metals. In this process,a narrow region of the metal ingot is melted using a circular mobile heater. As the heater moves along the ingot,the impurities prefer to remain in the molten state rather than the solid state. Consequently,the molten zone accumulates the impurities,making it contain a higher concentration of impurities compared to the original metal.

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