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Which method is used for obtaining high ...

Which method is used for obtaining high purity metals for semi conductor? Describe the process.

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R G PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE
  1. What is Hall-Heroult process? How many Al can be obtained by burning a...

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  2. What criterion is followed for the selection of the stationary phase i...

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  3. Zinc and not Copper is used for the recovery of silver from the comple...

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  4. The extraction of Au by leaching with NaCN involves both oxidation and...

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  5. What is the role of iodine in the refining of titanium?

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  6. Describe how the following change are brought about pig iron into stee...

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  7. Whose metal dust is used as a reducing agent in dye industry?

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  8. Describe the role of the following in the processes mentioned: Limesto...

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  9. Explain the role of the following in the processes mentioned: Depressa...

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  10. Why is the reduction of a metal oxide easier if the metal formed is in...

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  11. Which solution is used for the leaching of silver metal in the presenc...

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  12. Out of C and CO, which is better reducing agent at the lower temperatu...

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  13. Describe the role of SiO2 in the extraction of Copper from Copper matt...

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  14. Which method is used for obtaining high purity metals for semi conduct...

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  15. Draw the Schematic diagram of column chromatograph for industrial use.

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  16. What chemical principle is involved in choosing a reducing agent for g...

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  17. Give reasons for the following. Alumina is dissolved in cryolite for e...

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  18. Why Zinc oxide can be reduced to the metal by heating with Carbon andn...

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

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

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