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Write the principle of the vapour phase ...

Write the principle of the vapour phase refining.

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Principle of vapour refining : Metal is converted into a volatile compound which on strong heating decomposes to give metal.
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(a) Write the principle involved in the vapour phase refining of metals. (b) Write the name of the metal refined by each of the following processes : (i) Mond process (ii) van Arkel method (c ) What is the role of depresent in froth floatation process ?

Benefication of the ore can be done by different ways. It is increasing the concentration of ore by removing impurities, while refining is the process by which concentration of metal is incresed in the final product. The phase principle to apply vapour phase refining is/are:

Explain the steps involved in the vapour phase refining of Ni and Zr.

U-LIKE SERIES-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-LONG ANSWER QUESTIONS-I
  1. Write the principle of the following : Froth floatation process.

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  2. Write the principle of the following : Chromatography.

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  3. Write the principle of the vapour phase refining.

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  4. What is the role of depressant in froth floatation process?

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  5. Write the name of reducing agent to obtain iron from Fe(2)O(3) at high...

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  6. Name the method of refining of metals such as Germanium.

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  7. In the extraction of Al, impure Al(2)O(3) is dissolved in conc. NaOH t...

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  8. What is the role of coke in the extraction of iron from its oxides?

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  9. Name the method of refining of nickel.

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  10. What is the role of cryolite in the extraction of aluminium?

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  11. What is the role of limestone in the extraction of iron from its oxide...

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  12. Write the role of I2 in the Arkel method of refining.

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  13. Write the role of Cryolite in the extraction of aluminium.

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  14. Write the role of Dilute NaCN in the extraction of silver.

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  15. Indicate the principle behind the method used for the refining of Nick...

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  16. What is the role of dilute NaCN in the extraction of gold?

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  17. What is 'copper matte'?

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  18. Indicate the principle behind the method used for the refining of zinc...

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  19. What is the role of silica in the extraction of copper?

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  20. Which form of the iron is the purest form of commercial iron?

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