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Discussion

Preparation for Medical Entrance exams - Biology, Physics and Chemistry
(3)

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In the electrolysis of alumina, cryolite is added to

 
lower the melting point of alumina
Prevents the re-oxidation of the aluminium metal formed
minimise the anodic effect
remove impurities from alumina

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Elena Mary

Doesnt aluminium lower the melting point and bring conductivity to alumina?(NCERT extraction of metals)