Question

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​

Answer 1

b) 2 : 1

Explanation:-

The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is 2:1 by volume.

2H20(I) ---Electric Current---> 2H2(g) + O2(g)

In a decomposition reaction, a compound is broken down into its simpler forms. During electrolysis water is broken down into oxygen gas and hydrogen gas due to passing of electric current through it.