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Roasting of concentrated zinc sulphide o...

Roasting of concentrated zinc sulphide ore is completed at the temperature of 1200 K to __________.

A

ensure complete decomposition of `ZnSO_(4)` to ZnO

B

ensure complete melting of zinc

C

ensure evaporation of the volatile impurities

D

All of these

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The correct Answer is:
A
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TARGET PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-Critical Thinking
  1. Which method of purification is represented by following equations ? ...

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  2. During roasting of concentrated zinc sulphide ore, which of the follow...

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  3. Roasting of concentrated zinc sulphide ore is completed at the tempera...

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  4. Which of the following is INCORRECT regarding modern vertical retort p...

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  5. Iron exhibits property of ferromagnetism.

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  6. In metallurgy if iron, charge introduced in the blast furnace consists...

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  7. In the cup and cone arrangement of blast furnace, the cone enables .

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  8. In the metallurgy of iron, when limestone is added to the blast furnac...

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  9. The smelting of iron in the blast furnace involves all the following p...

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  10. Which of the following reactions does NOT occur in blast furnace ?

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  11. Which of the following is NOT a mineral of aluminium ?

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  12. Baeyer's process is used for the purification of bauxite containing as...

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  13. The chief impurity present in bauxite is

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  14. Which of the following reaction is involved in the Hall's method of pu...

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  15. Alumina is .

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  16. Aluminium is produced on a large scale by electrolysis of alumina, dis...

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  17. In hall and Heroult's process , the molten electrolyte is covered with...

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  18. Aluminothermic process is used for the extraction of metals, whose oxi...

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  19. High quantity of heat is produced in the formation of Al(2)O(3). This ...

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  20. For the extraction of chromium from Cr(2)O(3) the process adopted is ...

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