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Roosting is carried out to...

Roosting is carried out to

A

convert sulphide to oxide and sulphate

B

remove water of hydration

C

melt the ore

D

remove arsenic and sulphur impurities

Text Solution

Verified by Experts

The correct Answer is:
A, D
In roasting sulphide ore is converted into oxide, sulphate, during roasting moisture `(H_(2)O)` volatile oxides of metals like Se, Sb, As etc are removed
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AAKASH SERIES-METALLURGY-LEVEL-II (LECTRURE SHEET) (EXERCISE-I)
  1. The extraction of metals from oxide ores involve

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

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  3. Roosting is carried out to

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  4. of the following reduction process, correct processes are:

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  5. Roasting of copper pyrites is done

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  6. Highly electropositive metals can not he extracted by carbon reduction...

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  7. Which one of the following metals can be extracted by aluminothermit p...

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  8. For which of the following metal the carbon reduction cannot be used ?

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  9. The advantages of using carbon to reduce a number of oxides and other ...

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  10. The disadvantages of carbon reduction method are:

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

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  12. What are the froth stabilizers in forth floatation process

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  13. Froth flotation

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  14. The function of adding cryolite in the clectrolytic reduction of alumi...

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  15. Electrolysis method is used for the extraction of

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  16. Which of the following equation reprsents smelting process

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  17. In the extraction of which of the following metals is used for amalgam...

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  18. The flux that can be used for the removal of hasic impurities like Cou...

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  19. Chemical reduction is used in the extraction of

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  20. Bessemerisation is used in the metallurgy of

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