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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_2O_3+Na_3AlF_6 + CaF_2`

D

`Al_2O_3 + KF + Na_(3)AlF_(6)`

Text Solution

Verified by Experts

The correct Answer is:
C
`Na_(3)AlF_(6)` and `CaF_(2)` increase conductance and decrease M.P of `Al_(2)O_(3).`
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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?

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