Chemistry > 2000 > 45
WASSCE
in the electrolytic extraction of aluminium from purified alumina, molten cryolite is added in order to
A.
lower the melting point of the alumina
B.
prevent the aerial oxidation of the molten aluminium
C.
lower the activation energy of the reaction
D.
from a protective crust on top of electrolyte
Answer: A
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