Question

(A) Give scientific reasons :
(2) Cryolite (Na AlF) and fluorspar (CaF2) are added to the electrolytic mixture containing pure alumina.​

Answer 1

Answer:

1. Cryolite and fluorspar lower the fusion temperature of the mixture from 20000C to 10000C thereby saving electrical energy. They increase the conductivity of the mixture. They increase the mobility of the fused mixture.

Answer 2

Answer:

these two are added to reduce the melting point of alumina upto 1000 degree Celsius