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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.

Related tags

ScienceClass 10Chemical ReactionsElectrolysis Of WaterGas Volume RatioStoichiometry

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