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Explain: (i). Zone refining (ii). Co...

Explain:
(i). Zone refining
(ii). Column chromatography.

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DINESH PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -N.C.E.R.T. Exercise
  1. What is the role of depressant in froth floatation process?

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  2. Why is the extraction of copper from pyrites more difficult than that ...

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  3. Explain: (i). Zone refining (ii). Column chromatography.

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  4. Out of C and CO, which is a better reducing agent at 673K?

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  5. Name the common elements present in the anode mud in electrolytic refi...

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  6. Write down the reactions taking place in different zones in the blast ...

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  7. Write down the chemical reactions taking place in the extraction of zi...

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  8. State the role of silica in the metallurgy of copper.

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  9. What is meant by the term "chromatography"?

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  10. What criterion is followed for the selectrion of the stationary phase ...

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  11. Describe a method for refining nickel.

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  12. How can you separate alumina from silica in a bauxite ore associated w...

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  13. Giving examples differentiate between roasting and calcination.

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  14. How is cas iron different from pig iron ?

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  15. Why copper matte is put in silica lined converter?

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  16. What is the role of cryolite in the metallurgy of aluminium?

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  17. How is leaching carried out in case of low grade copper ores?

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  18. Why is zinc not extracted from zinc oxide through reduction using CO?

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

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  20. Out of C and CO, which is better reducing agent for ZnO?

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