In the metallurgy of aluminium,cryolite is mi | vedclass

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(D) . Cryolite $(Na_3AlF_6)$ is added to alumina $(Al_2O_3)$ during the Hall-$H$éroult process for two main reasons:$1$. It decreases the melting poin

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Decreases the melting point of alumina

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(D) . Cryolite $(Na_3AlF_6)$ is added to alumina $(Al_2O_3)$ during the Hall-$H$éroult process for two main reasons:$1$. It decreases the melting point of the mixture from approximately $2323 \ K$ to about $1140 \ K$,which saves energy.$2$. It increases the electrical conductivity of the molten mixture,facilitating the electrolysis process.

In the metallurgy of aluminium,cryolite is mixed in the molten state because it

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