Chemistry
In the electrolysis of alumina, cryolite is added to
- lower the melting point of alumina
- decrease the electrical conductivity
- minimize the anode effect
- remove impurities from alumina
Metallurgy
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Answer
lower the melting point of alumina
Reason — Addition of cryolite lowers the fusion point of the mixture i.e., mixture fuses around 950°C instead of 2050°C.
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