In the extraction of aluminium, the function of cryolite is to:

Lower the melting point of alumina

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Increase the melting point of alumina

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Remove impurities from alumina

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Minimise the anodic effect

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Solution

The correct option is A
Lower the melting point of alumina

Melting point of $A I_{2} O_{3}$ is very high, adding impurities reduces melting point

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Why is Cryolite added to Alumina during the extraction of Aluminium?

In the electrolytic extraction of aluminium, the substances which are not used to reduce the melting point of alumina are:

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