Q. 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
Explanation
(a)
Calcium is manufactured by the electrolysis of a molten mixture of calcium chloride containing some $CaF_{2}.$
$\ \ \ \ \ \ \ \ \ \ \ \ \ CaCl_{2}\ \rightleftharpoons Ca^{2 +} + 2Cl^{-}$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ Ca^{2 +} + 2e^{-}\ \rightarrow Ca\ (at\ cathode)$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.