By electrolysis of brine solution, which of the following is deposited/released at anode?
Correct answer: B. Cl2
- A. H2
- B. Cl2
- C. O2
- D. Na
Explanation
During the electrolysis of brine (a concentrated solution of sodium chloride), chloride ions (Cl-) are oxidized at the anode to form chlorine gas (Cl2). This occurs because chloride ions have a lower discharge potential compared to the hydroxide ions (OH-) that could potentially form oxygen gas. Hydrogen gas (H2) is released at the cathode as hydrogen ions (H+) are reduced. Sodium ions (Na+) remain in solution and are not deposited as a solid.
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