Question:
The method of zone refining of metals is based on the principle of :
The method of zone refining of metals is based on the principle of :
Updated On: Jul 13, 2024
- Greater mobility of the pure metal than that of the impurity
- Higher melting point of the impurity than that of the pure metal
- Greater noble character of the solid metal than that of the impurity
- Greater solubility of the impurity in the molten state than in the solid
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The Correct Option is D
Solution and Explanation
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.
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Concepts Used:
Refining
Refining is an industrial process of reducing the impurities of a substance. In simpler terms, refining is a process of purification of metals to remove the impurities from them to obtain the metals in the purest form.
Refining Methods of Metals
There are various methods used in the refining process of metals. They are listed below-
- Distillation
- Liquidation
- Poling
- Oxidation
- Electrolytic refining
- Zone refining
- Vapour phase refining
- Van-Arkel method
- Chromatographic method
Check: Zone Refining