During electrolysis of water, if the volume of oxygen produced is 12 mL at the same temperature and pressure, what volume of hydrogen is produced?
Answer and explanation
Correct answer: 24 mL
The electrolysis of water is represented by \(2H_2O(l) \rightarrow 2H_2(g) + O_2(g)\). At the same temperature and pressure, gas volumes are proportional to their mole ratio, so \(H_2:O_2 = 2:1\). Therefore, for 12 mL of oxygen, the volume of hydrogen is \(2 \times 12 = 24\) mL. The 12 mL option is incorrect because hydrogen and oxygen are not produced in equal volumes.
Frequently asked questions
What is the correct answer to this question?
24 mL
Why is this the correct answer?
The electrolysis of water is represented by \(2H_2O(l) \rightarrow 2H_2(g) + O_2(g)\). At the same temperature and pressure, gas volumes are proportional to their mole ratio, so \(H_2:O_2 = 2:1\). Therefore, for 12 mL of oxygen, the volume of hydrogen is \(2 \times 12 = 24\) mL. The 12 mL option is incorrect because hydrogen and oxygen are not produced in equal volumes.
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.
