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Aluminum is exteracted from alumine AI(2...

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

A

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

B

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

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
A
Extraction of `Al` from `Al_(2)O_(3)` is made by electrolytic reduction of molten mixture of alumina `(Al_(2)O_(3))`, cryolite `(Na_(3)AlF_(6))` and flurspar `CaF_(2)` in the ratio of `20:40:20` respectively.
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