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The method of zone refining of metals is...

The method of zone refining of metals is based on the principle of :

A

Greater mobility of the pure metal than that of impurity.

B

Higher melting point of 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.

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The correct Answer is:
D
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MOTION-METALLURGY-EXERCISE 3
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  2. Which of the following employ(s) thermal decomposition of volatile iod...

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  3. The method of zone refining of metals is based on the principle of :

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  4. Railway wagon axles are made by heating rods of iron embedded in charc...

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  5. In the extraction of Cu from its sulphide ore, the metal is formed by ...

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  6. Carnallite on electrolysis gives

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  7. Among the following statements, the incorrect one is

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  8. Match column–I and column–II and select the correct answer using the c...

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  9. Match column–I with column–II and select the correct answer using the ...

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  10. Statement-1:Sulphide ores are concentrated by froth floatation process...

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  11. Statement-1: Platinum and gold occur in native state in nature. Stat...

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  12. Statement-I : Wolframite impurities are separated from cassiterite by ...

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  13. Assertion : In smelting, roasted ore is heated with powdered coke in p...

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  14. Statement-1:Al is used as a reducing agent in aluminothermy. Stateme...

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  15. Assertion : Lead, tin and bismuth are purified by liquation method. ...

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  16. Statement-1: Wolframite impurity is separated from SnO, by magnetic se...

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  17. Ti can be purified by Van Arkel process. TiI(4) is a volatile compou...

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  18. Assertion : CuO can be reduced by C, H2 as well as Co Reason : CuO...

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  19. Assertion : Alkali metals cannot be prepared by the electrolysis of aq...

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  20. Assertion : Magnesium can be prepared by the electrolysis of aq. MgCl2...

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