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Question

Calcium is obtained by:

A
electrolysis of molten CaCl2
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B
electrolysis ofa solution of CaCl2 in water
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C
reduction of CaCl2 with carbon
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D
roasting of limestone
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Solution

The correct option is A electrolysis of molten CaCl2
Calcium is obtained by electrolysis of molten CaCl2
Calcium is obtained by the electrolysis of a fused mass consisting of six parts calcium chloride and one part calcium fluoride at about 700oC in an electrolytic cell made of graphite which acts as anode and a water-cooled cathode of iron which is suspended from the top in the fused mass. On passing current, calcium is discharged at the cathode.
CaCl2Ca2++2Cl
Henc option A is correct.

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