Calcium is extracted by the electrolysis of :

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Problem

Calcium is extracted by the electrolysis of : (1) Fused mixture of

CaCl_2

and

CaF_2

(2)

CaCl_2

fused salt solution (3) Used mixture of

CaCl_2

and NaF (4)

Ca_2(PO_4)_2

fused salt solution