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Electrolytic reduction of alumina to alu...

Electrolytic reduction of alumina to aluminium by Hall-Heroult process is carried out:

A

In the presence of NaCl

B

In the presence of fluorite

C

In the presence of cryolite which forms a melt with lower melting temperature

D

In the presence of cryolite which forms a melt with higher melting temperature

Text Solution

Verified by Experts

The correct Answer is:
C
Cryolite reduces the melting temperature.
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Statement-1:Electrolytic reduction of alumina to aluminium by Hall-Heroult process is carried in the presence of cryolite. Statement-2:Cryolite contains aluminium.

Electrolytic reduction of alumina to aluminum by the Hall-Heroult process is carried out

Hall-Heroult's process is given by :

The funciton of adding cryolite in the electrolytic reduction of alumina by Hall-Heroult process is to :

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