During the electrolysis of water, which gas is obtained in a larger volume at the cathode?
Answer and explanation
Correct answer: Hydrogen
Electrolysis of water is represented by 2H₂O(l) → 2H₂(g) + O₂(g). Reduction occurs at the cathode, so hydrogen is produced there. The balanced equation shows a 2:1 ratio: two volumes of hydrogen are formed for every one volume of oxygen. Oxygen is released at the anode. Nitrogen and chlorine are not products of pure water electrolysis.
Frequently asked questions
What is the correct answer to this question?
Hydrogen
Why is this the correct answer?
Electrolysis of water is represented by 2H₂O(l) → 2H₂(g) + O₂(g). Reduction occurs at the cathode, so hydrogen is produced there. The balanced equation shows a 2:1 ratio: two volumes of hydrogen are formed for every one volume of oxygen. Oxygen is released at the anode. Nitrogen and chlorine are not products of pure water electrolysis.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
