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Aluminium is extracted from Alumina (Al(...

Aluminium is extracted from Alumina (`Al_(2)O_3` ) by electrolysis of a molten mixture of

A

`Al_(2)O_(3) + HF + NaAIF_(4)`

B

`Al_(2)O_(3) + CaF_(2) + NaAIF_(4)`

C

`Al_(2)O_(3) + Na_(3)AIF_(6) + CaF_(2)`

D

`Al_(2)O_(3) + KF + Na_(3)AIF_(6)`

Text Solution

Verified by Experts

The correct Answer is:
C
`Al_(2)O_(3) + Na_(3) AIF_(6) +Caf_(2)` is ued in electrolytic reduction of Alumina
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Aluminium is extracted from alumina ( Al_2O_3 ) by electrolysis.

Aluminum is exteracted from alumine AI_(2)O_(3) by electrolysis of a molten mixture of :

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Aluminium is extracted from bauxite by the electrolysis of molten mixture of Al_(2)O_(3) 3 with cryolite. Reason (R) : The oxidation state of Al in cryolite is + 3. In the light of the above statements, choose the most appropriate answer from the options given below:

Aluminium is obtained from Al_(2)O_(3) by _____reduction.

Extraction OF Aluminium (Al)

Aluminium is extracted in the electrolysis of :

Anhydrous alumina (Al_(2)O_(3)) is known as

Aluminium oxide, Al_(2)O_(3) is

Aluminium is produced commercially by the electrolysis of Al_(2)O_(3) . How many hours would be required to produce 250 g of Al usinga 5.00 ampere current?

NARAYNA-METALLURGY-EXERCISE - III
  1. Flux used in the smelting of copper arc is:

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  2. Which metal is refined by Mond's process?

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  3. The form of iron obtained from blast furnace is:

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  4. Aluminium is extracted from Alumina (Al(2)O3 ) by electrolysis of a mo...

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  5. In the exteraction of copper from its sulphide ore, the metal is fanal...

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  6. Identify the alloy containing a non metal as a constituent in it

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  7. Which ore of the following is a mineral of iron ?

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  8. Which one of the following is not a sulphide ore ?

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  9. High purity copper is obtained by

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  10. Roasting of sulphides gives the gas X as a by product. This is a colou...

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  11. The process of zone refining is used in the purification of :

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  12. Amongest the following , how many ores can be concentrated by froth fl...

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  13. Which method of purification is represented by the following equations...

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  14. The statement that is not correct is

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  15. 'Metals are usually not found as nitrates in their ores''. Out of the ...

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  16. Cryolite is

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  17. Copper Matte is extracted from copper pyrites ore by heating it in bla...

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  18. In the exteraction of copper from its sulphide ore, the metal is fanal...

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  19. 'Metals are usually not found as nitrates in their ores''. Out of the ...

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  20. Match the following

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