1.

During electrolytic reduction of alumina, the electrolyte is (a) fused \( Al _{2} O _{3} \) (b) fused \( Na _{3} AlF _{6} \) (c) a mixture of fused \( Al _{2} O _{3}, Na _{3} AlF _{6} \), and \( CaF _{2} \) (d) fused \( CaF _{2}+ Al _{2} O _{3} \)

Answer»

During electrolytic reduction of alumina the purified Al2O3 is mixed with Na3AlF6 or CaF2.

which lower the melting point at the mixture and brings conductivity.

Hence, the electrolyte is fused CaF2 + Al2O3



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