1.

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

Answer»

in the presence of NaCl
in the presence of fluorite
in the presence of CRYOLITE which FORMS a MELT at lower TEMPERATURE and increases the ELECTRICAL conductivity
in the presence of cryolite which forms a melt at higher temperature and increases the electrical conductivity

Answer :C


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