Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is:
(a) 1:1
(b) 2:1
(c) 4:1
(d) 1:2
Ans. (b)
The reaction is shown as:
1 Mole of water has 2 moles of Hydrogen and 1 mole of water.
Therefore, the mole ratio of hydrogen and oxygen gas liberated is 2:1.