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In the electrolytic process for the extr...

In the electrolytic process for the extraction of aluminium, the electrolyte is :

A

`Al(OH)_(3)` in NaOH solution

B

An aqueous solution of `Al_(2)(SO_(4))_(3)`

C

A molten mixture of `Al_(2)O_(3) " and " Na_(3)AlF_(6)`

D

A molten mixute of `Al_(2)O_(3) " and " Al(OH)_(3)`

Text Solution

Verified by Experts

The correct Answer is:
C
Electrolyte is molten mixture of `Al_(2)O_(3)` (alumina) and `Na_(3)AlF_(6)` (cryolite)
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DINESH PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -Multiple Choice
  1. The important ore of iron is :

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  2. In the electrolytic process for the extraction of aluminium, the elect...

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  3. Cassiterite is an ore of :

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  4. In the extraction of iron, the slag produced is :

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  5. Heating pyrites to remove sulphur is called :

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  6. Nickel is purified by thermal decomposition of its

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  7. The most abundant element in the earth's crust (by weight ) is :

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  8. The process of converting hydrated alumina into anhydrous alumina is c...

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  9. Colemanite is :

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  10. In the thermite process, the reducing agent is :

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  11. Which of the following metals present as impurity passes into solution...

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

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

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

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  15. A cuprous ore among the following is :

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

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

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

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

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

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