Which gas is formed at the anode in the chlor-alkali process?
Answer and explanation
Correct answer: Chlorine
The governing concept is the electrode reaction during electrolysis of brine. Brine contains chloride ions, and 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 oxygen and carbon dioxide are not the main anode products in this process. Therefore, option B is correct.
Frequently asked questions
What is the correct answer to this question?
Chlorine
Why is this the correct answer?
The governing concept is the electrode reaction during electrolysis of brine. Brine contains chloride ions, and 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 oxygen and carbon dioxide are not the main anode products in this process. Therefore, option B is correct.
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.
