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Although thermodynamically feasible, in ...

Although thermodynamically feasible, in practice, magnesium metal is not used for the reduction of alumina in the metallurgy of aluminium. Why ?

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Temperatures below the point of intersection of` Al_(2)O_(3)` and MgO curves,magnesium can reduce alumina. But the process will be uneconomical.
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NCERT ENGLISH-GENERAL PRINCIPLES AND PROCESSESS OF ISOLATION OF ELEMENTS -Exercise
  1. Although thermodynamically feasible, in practice, magnesium metal is n...

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  2. Which of the ores mentioned in Table 6.1 can be concentrated by magnet...

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  3. What is the significance of leaching in the extraction of aluminium?

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  4. The reaction Cr2O3+2AltoAl2O3+2Cr (triangleG^(ɵ)=-421kJ)) Is therm...

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  5. It is true that under certain condition, Mg can reduce Al2O3 and Al ca...

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  6. Copper can be extracted by hydrometallurgy but not zinc because

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

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

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

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

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

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

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  13. Write chemical reactions taking place in the extraction of zinc from z...

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

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  15. Which method of refining may be more suitable if element is obtained i...

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  16. Which method of refining will you suggest for an element in which impu...

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  17. Describe a method for refining nickel.

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

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  19. Giving examples differentiate between roasting and calcination.

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  20. How is ‘cast iron’ different from ‘pig iron”?

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  21. Differentiate between “minerals” and “ores”.

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