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Which process of refining is usefull to ...

Which process of refining is usefull to get ultrapure semiconductor elements?

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R G PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE
  1. Write the reaction when silver is leached with KCN.

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  2. Write the principle of liquation?

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  3. Which process of refining is usefull to get ultrapure semiconductor el...

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  4. What is eluent?

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  5. Write the composition of German Silver.

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  6. Which is the purest form of commercial iron?

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

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  8. Why Copper matte is put in Silica lined converter?

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  9. What does a steep increase in the slope of a line an Ellingham diagram...

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  10. Name the process by which an ore of tin containing FeCrO4 in concentra...

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  11. Write two important ores each from iron & copper.

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  12. Describe the principle of froth flotation process.

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  13. Write the reactions involved in leaching process of alumina from bauxi...

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  14. Giving example differentiate between "roasting"& calcination.

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  15. What is pyro metallurgy? Describe the conditions of the equation used ...

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  16. From the following diagram suggest a condition under which magnesium c...

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  17. Write down the reaction taking place in different zones in the blast f...

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  18. How wrough iron is prepared from cast iron?

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  19. In reverberatory furnace how Cu is extracted from copper matte? Write ...

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  20. The reaction, Cr2O3 + 2Al rarr Al2O3 + 2Cr (DeltaG^@ = -421KJ) is ther...

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