Which is the correct group of three main products formed in the chlor-alkali process?
Answer and explanation
Correct answer: Hydrogen, chlorine and sodium hydroxide
The chlor-alkali process is the electrolysis of concentrated aqueous sodium chloride, or brine. At the cathode, water is reduced and hydrogen gas forms: 2H₂O + 2e⁻ → H₂ + 2OH⁻. At the anode, chloride ions are oxidised to chlorine: 2Cl⁻ → Cl₂ + 2e⁻. The remaining Na⁺ combines with OH⁻ to give sodium hydroxide. Therefore A is correct.
Frequently asked questions
What is the correct answer to this question?
Hydrogen, chlorine and sodium hydroxide
Why is this the correct answer?
The chlor-alkali process is the electrolysis of concentrated aqueous sodium chloride, or brine. At the cathode, water is reduced and hydrogen gas forms: 2H₂O + 2e⁻ → H₂ + 2OH⁻. At the anode, chloride ions are oxidised to chlorine: 2Cl⁻ → Cl₂ + 2e⁻. The remaining Na⁺ combines with OH⁻ to give sodium hydroxide. Therefore A 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.
