Question

Calcium is obtained by

• 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

Answer 1

Answer: (A)

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)