During the electrolysis of water, which gas is produced at the cathode in a greater volume?
Answer and explanation
Correct answer: Hydrogen
During electrolysis of acidified water, reduction occurs at the cathode and hydrogen gas is released there. The balanced equation is 2H2O(l) → 2H2(g) + O2(g). It shows a 2:1 ratio of hydrogen to oxygen, so hydrogen has twice the volume under the same conditions. Therefore option A is correct; oxygen forms at the anode, while nitrogen and carbon dioxide are not the expected products.
Frequently asked questions
What is the correct answer to this question?
Hydrogen
Why is this the correct answer?
During electrolysis of acidified water, reduction occurs at the cathode and hydrogen gas is released there. The balanced equation is 2H2O(l) → 2H2(g) + O2(g). It shows a 2:1 ratio of hydrogen to oxygen, so hydrogen has twice the volume under the same conditions. Therefore option A is correct; oxygen forms at the anode, while nitrogen and carbon dioxide are not the expected products.
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.
