On the electrolysis of H2SO4 (dil) solution by using inert electrode, which of the following is deposited or released at anode electrode?
Correct answer: B. O2 gas is released
- A. H2 gas is released
- B. O2 gas is released
- C. SO2 gas is released
- D. Neither O2 nor SO2 gas is released
Explanation
During the electrolysis of dilute H2SO4 solution with inert electrodes, oxygen gas is released at the anode. This is because water molecules are oxidized, producing O2 gas and hydrogen ions. The overall reaction at the anode is 2H2O → O2 + 4H+ + 4e-. The oxidation of sulfate ions does not occur because the oxidation of water is more favorable.Option A is incorrect because H2 gas is released at the cathode, not the anode. Option C is incorrect because SO2 gas is not produced in this process. Option D is incorrect as oxygen gas is indeed released at the anode.
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