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In the electrolysis of alumina cryolite ...

In the electrolysis of alumina cryolite is added to:

A

lower the melting point of alumina

B

increase the electrical conductivity

C

both

D

remove impurities from alumina

Text Solution

Verified by Experts

The correct Answer is:
C
Cryolite is added to lower the mpt of `Al_(2)_O_(3)` and to increase the electrical conductivity of `Al_(2)O_(3)`.
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AAKASH SERIES-METALLURGY-LEVEL-II (LECTRURE SHEET) (EXERCISE-I)
  1. The function of adding cryolite in the clectrolytic reduction of alumi...

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  2. Electrolysis method is used for the extraction of

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  3. Which of the following equation reprsents smelting process

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

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

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  6. Chemical reduction is used in the extraction of

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  7. Bessemerisation is used in the metallurgy of

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  8. Electro-metallurgical process (electrolysis of fused electrolyte) is e...

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  9. Electrolytic reduction is used in the extraction of

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  10. Carbon is used as a common reducing agent in the extraction of

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  11. The smelting of iron in a blast furnace involves the following process...

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  12. Which of the following reaction in the blast furnaces are endothermic ...

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  13. Silver is extracted by

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  14. In the electrolysis of alumina cryolite is added to:

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  15. Which of the following metals) can be obtained by electrolysis of thei...

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  16. Electrolytic process is used for the extraction of

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  17. Which of the following contains) aluminium

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  18. Which of the following mineralores contains magnesium?

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  19. Which of the following is are present in mica?

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  20. Which is (are) ore (s) of almun num?

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