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In the electrolysis of water, if the volume of oxygen produced is 15 mL, what will be the volume of hydrogen produced under the same conditions?

Answer and explanation

Correct answer: 30 mL

The electrolysis equation is 2H₂O → 2H₂ + O₂. It shows that hydrogen and oxygen are produced in a volume ratio of 2:1, provided temperature and pressure are the same. Therefore, for 15 mL of oxygen, hydrogen volume = 2 × 15 = 30 mL. Option A is half the oxygen volume, while B ignores the ratio and D uses an incorrect factor of three.

Related tags

ScienceClass10Chemical ReactionsElectrolysisGas RatioChemical Reactions And EquationsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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