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Extraction of metals from sulphide cres ...

Extraction of metals from sulphide cres is done by

A

Electrolysis

B

smelting

C

Hydrometallurgy

D

Roasting

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The correct Answer is:
B
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AAKASH SERIES-PRINCIPLES OF METALLURGY-OBJECTIVE EXERCISE-1
  1. During extraction of a metal the ore is roasted if it is a

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  2. A common metal that is used for the extraction of some metals from the...

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  3. Extraction of metals from sulphide cres is done by

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  4. To remove basic impurities from the ore the substance generally used i...

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  5. During smelting an additional substance added to form a fusible pro...

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  6. Calcination is the process of heating the ore :

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  7. To which of the following ores, calcination process in not applicable

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  8. Roasting is carried out in case of

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  9. Smelting is usually carried out in

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  10. Slag is a product of

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  11. In oxidisin roasting of Zn, S porducts are

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  12. Ag(2)S or in mixed with NaCl and heated to 6000^(@) in the presence o...

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  13. For which one the following reaction Delta S is positive

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  14. For which one of the followinng reaction Delta G decreases with ...

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  15. For which one of the following reaction , the graph of Delta ...

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  16. The least stable oxide at room temperature is

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  17. Ni + CO overset(330-350 K)to Ni(CO)(4) No(CO)(4) overset(450-470K) ...

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  18. The process of zone refining is used for

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  19. The process used in the refining of aluminimum and zinc metals ...

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  20. In the metallurgy of which of the following supellation process ...

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