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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_2O_3 + HF + NaAlF_4 `

B

`Al_2O_3 + CaF_ 2 + NaAlF_ 4 `

C

` Al_2 O_ 3 + Na_3AlF_6 + CaF_ 2 `

D

`Al_2O_3 + KF + Na_2AlF_6 `

Text Solution

Verified by Experts

The correct Answer is:
C
` Al _ 2 O _ 3 + N a _ 3 AlF_6 + C a F_ 2 `
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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:

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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?

PRADEEP-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS -COMPETITION FOCUS (JEE(Main and Advanced)/MEDICAL ENTRANCE SPECIAL) MULTIPLE CHOICE QUESTIONS (I)
  1. The auto reduction process is not used in the metallurgy of

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  2. Cryolite is:

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

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  4. In the correct of the Hall-Heroult process for the extraction of Al, w...

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  5. The metal that cannot obtained by electrolysis of an aqueous solution ...

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  6. In the alumino thermite process aluminium acts as

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  7. Which of the following is used in thermine welding ?

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  8. The process of isolation of metals by dissolving the ore in a suitable...

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  9. The metal which can be used to obtain metallic Cu from aqueou...

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  10. Extraction of gold (Au) involves the formation of complex io...

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  11. Extraction of gold and silver involves leaching with CN^(-)ion.silver ...

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  12. Extraction of chlrorine from brine solution is based on

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  13. In electrorefining of copper, some gold is deposited as

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  14. During the process of electroytic refining of copper some metals prese...

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  15. In zone-refining methode the molten zone

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  16. Match items of Column I with the items of Column II and assign the co...

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  17. Which of the following pairs of metals uis purified by van arkel meth...

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  18. Van Arkel method of refining zirconium involves

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  19. Which method of purification is represented by the following equation?...

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

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