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Roasting of copper pyrites is done:...

Roasting of copper pyrites is done:

A

to remove moisture

B

to oxidise free sulphur

C

to decompose pyrite into `Cu_(2)S` and FeS

D

to remove volatile organic impurities

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The correct Answer is:
A, B, C, D
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VK JAISWAL ENGLISH-METALLURGY-One OR MORE ANSWERS IS/ ARE CORRECT
  1. Which of the following process makes the ore porous ?

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  2. Which of the following ores is / are oxide ore (s) ?

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  3. Roasting of copper pyrites is done:

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  4. Which of the following is a correct statement ?

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  5. In which of the following pairs, both the minerals are oxides ?

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  6. Which of the following mineral does not contain sodium ?

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  7. Which of the following pair consists of ore of the same metal ?

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  8. The process (es) by which lighter earthy particles are freed from the ...

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  9. Roasting is carried out to :

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  10. The chemical treatment of the ore for concentration is done in the cas...

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  11. Froth floatation :

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  12. Which of the following reaction(s) occurs during calcination?

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  13. Amphoteric nature of aluminium is employed in which of the following p...

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  14. Which of the following is true for calcination of metal ore ?

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  15. The difference (s) between roasting and calcination is / are :

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  16. The etraction of metals from oxide ores involves

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  17. Metals which can be extracted by smelting process are :

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  18. Of the following reduction processes, correct processes are :

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  19. In the extraction of aluminium metal, one of the process is summarised...

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  20. During the production of iron and steel.

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