Question

In Hall Heroult's process fluorspar is used to increase the and powdered coke is used to reduce the , during the reaction .

• A. solubility
• B. conductivity
• C. heat loss
• D. melting point

Answer 1

Answer: (B), (C)

heat loss

Hall-Heroult's process is used in the manufacture of Aluminium. During this process, fluorspar is ($Ca{F}_2$) is used as it helps in increasing the electrical conductivity of electrolyte. On the other hand, powdered coke reduces the heat loss and prevents the burning of anode.