Why the volume ratio of hydrogen to oxygen is less than 2:1 when electrolyzing water

Why the volume ratio of hydrogen to oxygen is less than 2:1 when electrolyzing water

It should be greater than 2:1 the solubility of oxygen in water is greater than that of hydrogen.

What is the reason why the volume of hydrogen is less than 1/2 of the volume of oxygen at the beginning of the electrolytic water test

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