What is the volume ratio of hydrogen to oxygen gases produced during the electrolysis of water?
Answer and explanation
Correct answer: 2 : 1
The balanced equation for electrolysis of water is \(2\mathrm{H_2O} \rightarrow 2\mathrm{H_2} + \mathrm{O_2}\). At the same temperature and pressure, gas volumes are proportional to their number of moles. Therefore, the volume ratio of hydrogen to oxygen is \(2:1\). The ratio \(1:2\) is the reverse ratio, so it is not correct.
Frequently asked questions
What is the correct answer to this question?
2 : 1
Why is this the correct answer?
The balanced equation for electrolysis of water is \(2\mathrm{H_2O} \rightarrow 2\mathrm{H_2} + \mathrm{O_2}\). At the same temperature and pressure, gas volumes are proportional to their number of moles. Therefore, the volume ratio of hydrogen to oxygen is \(2:1\). The ratio \(1:2\) is the reverse ratio, so it is not correct.
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.
