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  4. In the electrolytic extraction of aluminium, cryolite is used

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Q. In the electrolytic extraction of aluminium, cryolite is used

The p-Block Elements

Solution:

Cryolite $Na _{3} AlF _{6}$ is added

(1) To decrease the melting temperature from $2323\, K$ to $1140\, K$

(2) To increase the electrical conductivity of solution