Q.

The major role of flourspar, CaF2 which is added in small amount in the electrolytic reduction of Al2O3 dissolved in fused cryolite is

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a

To increase the conductivity of the fused mixture

b

To lower the fusion temperature of the melt

c

To act as catalyst

d

To decrease the rate of oxidation of carbon at the anode

answer is A, B.

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Detailed Solution

Due to ionization process, the MP decreases and the conductivity increases.

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