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Solution


Q.

Electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is _____.
1 1 : 1  
2 2 : 1  
3 4 : 1  
4 1 : 2  

Ans.

(2)

The mole ratio of hydrogen and oxygen gases liberated during the electrolysis of water is 2 : 1. Since two atoms of hydrogen and one atom of oxygen are present in the water molecule respectively:

2H2O→2H2+O2