1.

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

Answer»

(d) (Al2O3) + Na3AlF6 + CaF2



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