Question

In the electrolysis of alumina, cryolite is added to
(1) lower the melting point of alumina
(2) increase the electrical conductivity
(3) minimise the anode effect
(4) remove impurities from alumina

• A. 1, 2 and 3 are correct
• B. 1 and 2 are correct
• C. 2 and 4 are correct
• D. 1 and 3 are correct

Answer 1

Answer: (B)

Cryolite lowers the melting point of alumina and increases its electrical conductivity. Due to these reasons, it is added with alumina during electrolysis.