What happens at the anode in the chlor-alkali process?
Answer and explanation
Correct answer: Chloride ions lose electrons and form chlorine
The governing electrochemical rule is oxidation at the anode, meaning loss of electrons. In brine, chloride ions migrate toward the anode and are oxidised according to 2Cl⁻ → Cl₂ + 2e⁻, releasing chlorine gas. Hence option A is correct. Hydrogen is produced at the cathode, sodium metal is not deposited from aqueous brine, and sodium hydroxide remains in solution rather than precipitating as stated.
Frequently asked questions
What is the correct answer to this question?
Chloride ions lose electrons and form chlorine
Why is this the correct answer?
The governing electrochemical rule is oxidation at the anode, meaning loss of electrons. In brine, chloride ions migrate toward the anode and are oxidised according to 2Cl⁻ → Cl₂ + 2e⁻, releasing chlorine gas. Hence option A is correct. Hydrogen is produced at the cathode, sodium metal is not deposited from aqueous brine, and sodium hydroxide remains in solution rather than precipitating as stated.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
