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Zone refining is based on the principle ...

Zone refining is based on the principle that __________ .

A

Greater mobility of the pure metal than that of the impurity

B

Higher melting point of the impurity than that of the pure metal

C

Greater noble character of solid metal than that of impurity

D

Greater solubility of the impurity in the molten state of metal than the solid

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AAKASH INSTITUTE ENGLISH-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-Objective type Questions (One option is correct)
  1. Which of the following metals is purified by distillation process ?

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  2. Vapour phase refining can be carried out in case of

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  3. Zone refining is based on the principle that .

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  4. Which of the following is not a method of purification of metals ?

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  5. Assertion: Zone refining method is used to produce pure metals which a...

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  6. Which of the following is not a use of aluminimum ?

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  7. Which of the following is not a use of zinc ?

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  8. Wrought iron is used for making

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  9. Which of the followed metals can be extracted by using carbon reductio...

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  10. Purest form of iron is

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  11. The metal oxide which cannot be reduced to metal by carbon is

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  12. On heating a mixture of Cu(2)O and Cu(2)S, we get

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  13. Which of the following pairs of metals is purified by van-Arkel method...

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  14. State briefly the principles which serve as basis for the following op...

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  15. In zone refining methods, the molten zone

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  16. Ag(2)S+NaCNto(A), (A)+Znto(B)+Ag (A) and (B) are respectively

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  17. Poling process is used

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  18. Which one of the following contains both iron and copper ?

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  19. Choose the false statement

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  20. In zone refining methods, the molten zone

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