Question 11 - MCQs from NCERT Exemplar - Chapter 1 Class 10 - Chemical Reactions and Equations

Last updated at August 14, 2026 by

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

The electrolysis of water takes place as:

Electrolysis-01.jpg

Reaction when Electrolysis of water takes place - Teachoo.jpg

Since

  • 2 Moles Hydrogen gas
  • And 1 Mole Oxygen gas is liberated

 

So, the correct option is (b) 2:1

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