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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 higher melting temperature

D

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

Text Solution

Verified by Experts

The correct Answer is:
D
Addition of crolite makes the fuse melt at lower melting temperature as well as good conductor of current.
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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.

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