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To remove basic impurities from the ore ...

To remove basic impurities from the ore the substance generally used is

A

`SiO_2`

B

`P_2 O_5`

C

`P_2 O_5 (or) SiO_2`

D

`CaCO_3`

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Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-PRINCIPLES OF METALLURGY-OBJECTIVE EXERCISE-1
  1. A common metal that is used for the extraction of some metals from the...

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  2. Extraction of metals from sulphide cres is done by

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

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

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  5. Calcination is the process of heating the ore :

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

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  7. Roasting is carried out in case of

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  8. Smelting is usually carried out in

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  9. Slag is a product of

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  10. In oxidisin roasting of Zn, S porducts are

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

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

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

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

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  15. The least stable oxide at room temperature is

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

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  17. The process of zone refining is used for

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

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

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  20. In zone - Refining method the molten zone :

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