First slide

Atomic and physical properties

Question

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

Easy

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 temperaure

Solution

Addition of cryolite makes the fuse melt at lower melting temperature as well as good conductor of current.

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