Q. In the electrolysis of water, 1 F of electrical energy would evolve
A) 1 mole of oxygen
B) 1 g atom of oxygen
C) 8 g of oxygen
D) 22.4 L of oxygen
Explanation
(c)
Hydrolysis of water can be represented by the following equations
${2H}_{2}O\ \rightleftharpoons \ O_{2} + \ {4H}^{+} + \ {4e}^{-}$
∵ 4 Faraday of charge liberate $O_{2}\ = \ 32\ g$
∴ 1 Faraday of charge liberate $O_{2}\ = \frac{32}{4}\ \ g$
=8 g
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.