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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 + NaAlF_4`

B

`Al_2 O_3 + CaF_2 + NaAlF_4`

C

`Al_2 O_3 + Na_3 AlF_6 + CaF_2`

D

`Al_2 O_3 + KF + Na_3 AlF_6`

Text Solution

Verified by Experts

The correct Answer is:
C
`Al_2 O_3 + Na_3 AlF_6 + CaF_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:

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?

MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-COMPETION FILE (Objective Questions) (Multiple Choice Question from competitive examinations)
  1. Which of the following pairs of metals uis purified by van arkel meth...

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  2. which of the following electronts is present as the impurity to the m...

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

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

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

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

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  7. Sphalerite is concentrated by

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  8. In the extraction of copper from its sulphide ore, the metal finally o...

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

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  10. Match the items of Column I with item of Column II and assign the corr...

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

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  12. Considering Ellingham diagram, which of the following metals can be us...

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  13. Which one is malachite from the following

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  14. Identify the reaction that does not take place in a blast furnace

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  15. In the alumino-thermite process, Al acts as :

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  16. In view of the signs of Delta(r)G^(@) for the following reactions : ...

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

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  18. The function of potassium ethyl xanthate in froth floatation process i...

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  19. The first step in the extraction of copper from copper pyrites

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  20. The statement that is not correct is

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