Q. When sodium chloride solution is electrolysed, the gas that is liberated at the cathode is
A) Oxygen
B) Chlorine
C) Hydrogen
D) Air
Explanation
(c)
$2NaCl + 2H_{2}O\ \overset{\ \ \ \ \ Electrolysis\ \ \ \ \ }{\rightarrow}\ 2NaOH + \ \ \ {Cl}_{2}\ + \ \ \ \ H_{2}\$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ anode\ \ \ \ \ cathode\$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.