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Which solution is used as electrolyte in...

Which solution is used as electrolyte in the extraction of aluminium metal ?

A

`Al_(2)O_(3).H_(2)O`

B

`Al_(2)O_(3) " and " Na_(3)AlF_(6)` (molten solution)

C

`Al_(2)O_(3)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
Molten solution of `Al_(2)O_(3) " and " Na_(3)AlF_(6)` is used as electrolyte because `Al_(2)O_(3)` as such is a poor conductor of electricity.
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DINESH PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -Multiple Choice
  1. Which of the following metals present as impurity passes into solution...

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  2. Which of the following processes is used in the extractive metallurgy ...

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  3. Which solution is used as electrolyte in the extraction of aluminium m...

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  4. CN^(-) solution is used in the extraction of which metal ?

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  5. A cuprous ore among the following is :

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  6. All ores are minerals while all minerals are not ores because :

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  7. The process used for the extraction of sodium is called :

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  8. The common method for the extraction of metals from the oxide ore is :

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  9. Which of the following is not an ore of iron ?

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  10. Which of the following processes is used in the extractive metallurgy ...

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  11. The method of zone refining of metals is based on the principle of :

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  12. Pb and Sn are extracted from their chief ore by :

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  13. Which of the following is not an ore of magnesium ?

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  14. Extraction of zinc from zinc blende is achieved by

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  15. Which of the following statements about the advantage of roasting of s...

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  16. Sulphide ores of the metals are usually concentrated by froth floatati...

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  17. Which of the following is not an ore of aluminium ?

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  18. Which of the following factors is of no significance for roasting sulp...

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  19. When compared to DeltaG^(@) for the formation of Al(2)O(3), DeltaG^(@)...

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  20. Native silver metal forms a water soluble complex with a dilute soluti...

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