Ncert Exercises & Solutions

6.18 What is the role of cryolite in the metallurgy of aluminium?

Cryolite (

N a_{3} A I F_{6}

) has two roles in the metallurgy of aluminium:

1. To decrease the melting point of the mixture from 2323 K to 1140 K.

2. To increase the electrical conductivity of $A I_{2} O_{3}$ .