During the electrolysis of dilute sulphuric acid using platinum electrodes, which product is formed at the cathode?
AOxygen gas
BSulphur dioxide gas
CHydrogen gasCORRECT
DSulphur trioxide gas
GCEChemistryRedox and Electrochemistry2023
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At the cathode (negative electrode), reduction occurs. Hydrogen ions (H⁺) from the dilute sulphuric acid are preferentially discharged and reduced to hydrogen gas: 2H⁺ + 2e⁻ → H₂. Oxygen is produced at the anode by oxidation of water/hydroxide ions.
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