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Name the method of metal refining which ...

Name the method of metal refining which is generally used when a metal of high degree of purity is needed.

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Zone refining.
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CENGAGE CHEMISTRY ENGLISH-APPENDIX INORGANIC VOLUME 2-Short Answer Type
  1. What is the name given to solid phase of earth?

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  2. Give one example where hydrometallurgy is used for metal extraction?

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  3. Name the method of metal refining which is generally used when a metal...

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  4. When is electrolytic reduction applied for getting a metal?

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  5. What name is given to carbon reduction process for extracting the meta...

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  6. An ore has impurities which are attracted by magnet suggest process fo...

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  7. In moist air, copper corrodes to produce a green layer on the surface....

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  8. The value ofDelta (f) G^(Ө) for formation of Cr(2) O(3) is – 540 kJmo...

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  9. What do you understand by roasting in presence of NaCl?

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  10. Why NF3 cannot be hydrolysed, while NCl3 can be readily hydrolysed?

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  11. Why NI5 does not exist While PCl5 exists?

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  12. Why the boiling point of ammonia is greater than phosphine?

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  13. Why NO is paramagnetic?

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  14. Nitrogen exists as diatomic molecule and phosphorus as P(4). Why?

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  15. Why nitrogen gas is inert?

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  16. Why phosphorus is more reactive than nitrogen?

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  17. Why nitrogen does not form penthalides?

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  18. Why bismuth does not from pentahalides?

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  19. What type of hydridisation is involveed in the formation of pentahalid...

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  20. An element X belongs to group I or 2 or 15. Its oxide react with water...

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