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At which electrode is the gas of greater volume produced during the electrolysis of water?

Answer and explanation

Correct answer: Cathode

In the electrolysis of water, hydrogen gas is produced at the cathode and oxygen gas at the anode. From \(2H_2O \rightarrow 2H_2 + O_2\), the volume ratio of hydrogen to oxygen is \(2:1\). Therefore, the greater volume of gas, hydrogen, is produced at the cathode. Oxygen is produced at the anode, but its volume is half that of hydrogen.

Related tags

Class 10 ScienceChemical ReactionsElectrolysis Of WaterCathodeAnodeGas Volume

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