What is the correct order of gases produced at the anode and cathode during the electrolysis of water?
Answer and explanation
Correct answer: Oxygen at the anode and hydrogen at the cathode
During electrolysis of water, reduction occurs at the cathode, producing hydrogen gas, whereas oxidation at the anode produces oxygen gas. The overall reaction is \(2H_2O(l) \rightarrow 2H_2(g) + O_2(g)\). Therefore, oxygen is produced at the anode and hydrogen at the cathode. Option B reverses the gases at the two electrodes.
Frequently asked questions
What is the correct answer to this question?
Oxygen at the anode and hydrogen at the cathode
Why is this the correct answer?
During electrolysis of water, reduction occurs at the cathode, producing hydrogen gas, whereas oxidation at the anode produces oxygen gas. The overall reaction is \(2H_2O(l) \rightarrow 2H_2(g) + O_2(g)\). Therefore, oxygen is produced at the anode and hydrogen at the cathode. Option B reverses the gases at the two electrodes.
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.
