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During extraction of a metal the ore is ...

During extraction of a metal the ore is roasted if it is a

A

sulphate ore

B

sulphide ore

C

Carbonate ore

D

Oxide ore

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The correct Answer is:
A
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AAKASH SERIES-PRINCIPLES OF METALLURGY-OBJECTIVE EXERCISE-1
  1. In the extraction of gold ,alluival sand is conectrated by whic...

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  2. Which one of the following is used as conditioner in froth floa...

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  3. During extraction of a metal the ore is roasted if it is a

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

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  5. Extraction of metals from sulphide cres is done by

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

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

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  8. Calcination is the process of heating the ore :

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

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  10. Roasting is carried out in case of

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  11. Smelting is usually carried out in

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  12. Slag is a product of

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  13. In oxidisin roasting of Zn, S porducts are

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

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

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

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

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  18. The least stable oxide at room temperature is

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  19. Ni +4CO overset(330-350 K) to Ni(CO ) 4 overset(450-470 k ) to Ni +4C...

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  20. The process of zone refining is used for

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