Question

Calcium is obtained by:

• A. electrolysis of molten $CaC{l}_2$
• B. electrolysis ofa solution of $CaC{l}_2$ in water
• C. reduction of $CaC{l}_2$ with carbon
• D. roasting of limestone

Answer 1

The correct option is A electrolysis of molten $CaC{l}_2$

Calcium is obtained by electrolysis of molten $CaC{l}_2$
Calcium is obtained by the electrolysis of a fused mass consisting of six parts calcium chloride and one part calcium fluoride at about ${700}^{o}C$ 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.
$CaC{l}_2\rightleftharpoons C{a}^{2+}+2C{l}^{-}$
Henc option A is correct.