Q. Calcium is obtained by

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A

Electrolysis of molten $CaCl_{2}$

B

Electrolysis of solution of $CaCl_{2}$ in water

C

Reduction of $CaCl_{2}$ with carbon

D

Roasting of lime stone

Solution:

Calcium is manufactured by the electrolysis of a molten mixture of calcium chloride containing some $CaF_{2}.$
$\text{CaCl}_{2} → \text{Ca}^{+ 2} + 2 \text{Cl}^{-}$
$Ca ^{+2}+2 e ^{-} \rightarrow Ca$ (Cathode)
$2 Cl ^{-} \rightarrow Cl _{2}+2 e ^{-}$(Anode)

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