During the electrolysis of water, if the volume of oxygen produced is 8 mL, what volume of hydrogen will be produced at the same temperature and pressure?
Answer and explanation
Correct answer: 16 mL
The reaction is \(2H_2O \rightarrow 2H_2 + O_2\). At the same temperature and pressure, the gas volumes are in the ratio of their coefficients, so \(H_2:O_2 = 2:1\). Therefore, for 8 mL of oxygen, the volume of hydrogen is \(2 \times 8 = 16\) mL. The 8 mL option is incorrect because the volumes of the two gases are not equal.
Frequently asked questions
What is the correct answer to this question?
16 mL
Why is this the correct answer?
The reaction is \(2H_2O \rightarrow 2H_2 + O_2\). At the same temperature and pressure, the gas volumes are in the ratio of their coefficients, so \(H_2:O_2 = 2:1\). Therefore, for 8 mL of oxygen, the volume of hydrogen is \(2 \times 8 = 16\) mL. The 8 mL option is incorrect because the volumes of the two gases are not equal.
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.
