Aluminium is extracted by the electrolysis of

  • Option 1)

    bauxite

  • Option 2)

    alumina

  • Option 3)

    alumina mixed with molten cryolite

  • Option 4)

    molten cryolite

 

Answers (1)

As we learnt in 

Electrolytic Refining -

Many of the metals such as Cu,Au,Ag,Al,Hb etc are purified by this method.

- wherein

The impure metal is made anode while a thin sheet of pure metal acts as a cathode. 

 

 Bauxite is first purified into alumina which is dissolved in molten cryolite to lower energy costs and then extraction is done by electrolysis.


Option 1)

bauxite

This option is incorrect.

Option 2)

alumina

This option is incorrect.

Option 3)

alumina mixed with molten cryolite

This option is correct.

Option 4)

molten cryolite

This option is incorrect.

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