Question

Aluminium is extracted from alumina (Al₂O₃) by electrolysis of a molten mixture of :
(a) Al₂O₃ + HF + NaAlF₄
(b) Al₂O₃ + CaF₂ + NaAlF₄
(c) Al₂O₃ + Na₃AlF₆ + CaF₂
(d) Al₂O₃ + KF + Na₃AlF₆

Answer 1

(c)Al2O3+Na3AlF6+CaF2