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Aluminium is extracted in the electrolys...

Aluminium is extracted in the electrolysis of :

A

alumina

B

bauxite

C

molten cryolite.

D

alumina mixed with molten cryolite

Text Solution

Verified by Experts

The correct Answer is:
D
Alumina is mixed with cryolite, in molten state which make alumina good conductor and lowers the fusion temperaure also.
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Knowledge Check

  • Aluminium is extracted by the electrolysis of

    A
    Bauxite
    B
    Alumina
    C
    Alumina mixed with molten cryolite
    D
    Molten cryolite

  • Calcium is extracted by the electrolysis of :

    A
    Fused mixture of `CaCl_(2)` and `CaF_(2)`
    B
    `CaCl_(2)` fused salt solution
    C
    fused mixture of `CaCl_(2)` and `NaF`
    D
    `Ca_(3)(PO_(4))_(2)` fused salt solution

  • Aluminium is obtained by the electrolysis of pure of Al_(2)O_(3) dissolved in

    A
    Alumina
    B
    Bauxite
    C
    Cryolite
    D
    Felspar

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    Sodium metal is extracted by the electrolysis of fused chloride but potassium metal cannot be obtained by electrolysis of fused potassium chloride . Why so ?

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    In an electrolytic tank, aluminium metal is being extracted by the electrolysis of molten aluminium oxide using carbon electrodes. It is observed that one of the carbon electrodes is gradually burnt aay and has to be replaced. (a) Which carbon electrode (cathode or anode) is burnt away? (b) why is this carbon electrode burnt away?

    Potassium is extracted by the electrolysis of

    In the commerical electrochemical process for aluminium extraction, the electrolyte used is :

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