Which gas is formed at the anode in the chlor-alkali process?
Answer and explanation
Correct answer: Chlorine
In chlor-alkali electrolysis, brine supplies chloride ions and water. At the anode, oxidation occurs: chloride ions lose electrons and form chlorine gas, represented by 2Cl⁻ → Cl₂ + 2e⁻. Hydrogen is produced at the cathode, while carbon dioxide is unrelated to this process. Under the standard school-level treatment of concentrated brine, chlorine is therefore the correct answer, option B.
Frequently asked questions
What is the correct answer to this question?
Chlorine
Why is this the correct answer?
In chlor-alkali electrolysis, brine supplies chloride ions and water. At the anode, oxidation occurs: chloride ions lose electrons and form chlorine gas, represented by 2Cl⁻ → Cl₂ + 2e⁻. Hydrogen is produced at the cathode, while carbon dioxide is unrelated to this process. Under the standard school-level treatment of concentrated brine, chlorine is therefore the correct answer, option B.
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.
