Aluminium is extracted by the electrolysis of

• Isolation Metals

Aluminium is extracted by the electrolysis of

1. bauxite
2. molten cryolite
3. alumina mixed with molten cryolite
4. alumina

Answer

Aluminium is extracted by electrolysis of fused mixture of alumina and cryolite. First, the aluminium oxide must be made molten so that electricity can pass through it. Aluminium oxide (Bauxite) has a very high melting point, so it would be expensive to melt it. Instead, it is dissolved in molten cryolite, an aluminium compound with a lower melting point than aluminium oxide.

The correct option is C.