Question
Chemistry Question on Electrolysis
In the electrolysis of alumina to obtain aluminium metal, cryolite is added mainly to:
A
Lower the melting point of alumina
B
Dissolve the alumina in molten cryolite
C
Remove impurities from alumina
D
Increase electrical conductivity
Answer
Lower the melting point of alumina
Explanation
Solution
Cryolite is added during electrolysis to lower the melting point of alumina, making the process more energy efficient.