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(i) Name the method of refining of metal...

(i) Name the method of refining of metals such as Germanium.
(ii) In the extraction of Al, impure `Al_(2)O_(3)` is dissolved in conc. NaOH to form sodium aluminate and leaving impurities behind. What is the name of this process?
(iii) What is the role of coke in the extraction of iron from its oxides?

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MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-Revision Exercises(Short answer questions)
  1. Explain the steps involved in the vapour phase refining of Ni and Zr.

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  2. (a) Name the role of Na(3)AlF(6) in the electrolytic reduction of alum...

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  3. (i) Name the method of refining of metals such as Germanium. (ii) In...

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  4. All ores are minerals while all minerals are not ores because :

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  5. (a) What are the two requirements for vapour phase refining? Write the...

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  6. Name the principal ore of aluminium. Explain the significance of leach...

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  7. (a) Write the principle of method used for the refining of germanium ...

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  8. Describe the role of (i) NaCN in the extraction of gold from its ore...

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  9. Outline the principles of refining of metals by the following methods....

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  10. (i) Name a metal refined by Van Arkel method. (ii) Explain the proce...

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  11. (i) Explain zone refining method for refining of metals. (ii) Explai...

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  12. (i) Write composition of copper matte. (ii) Write balanced equations...

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  13. (a) Name the method of refining which is (i) used to obtain semicond...

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  14. Describe the role of the following : (i) NaCl in the extraction of ...

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  15. Match the following processes of metallurgy with their corresponding o...

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  16. Describe the principle controlling each of the following processes: ...

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  17. (i) Name a method used for the refining of zirconium. (ii) What is t...

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  18. Write the principle of the following (a) Zone refining (b) Froth f...

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  19. (a) Write the principle involved in the vapour phase refining of metal...

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  20. Write down the reactions taking place in Bast furnace related to the m...

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