At which electrode is hydrogen produced in the chlor-alkali process?
Answer and explanation
Correct answer: Cathode
In the chlor-alkali process, water is reduced at the negatively charged cathode. The cathodic reaction can be represented as 2H₂O + 2e⁻ → H₂ + 2OH⁻, so hydrogen gas is released at the cathode. Therefore option B is correct. Chlorine is formed at the anode by oxidation of chloride ions; the remaining choices do not describe an electrode reaction and cannot produce hydrogen.
Frequently asked questions
What is the correct answer to this question?
Cathode
Why is this the correct answer?
In the chlor-alkali process, water is reduced at the negatively charged cathode. The cathodic reaction can be represented as 2H₂O + 2e⁻ → H₂ + 2OH⁻, so hydrogen gas is released at the cathode. Therefore option B is correct. Chlorine is formed at the anode by oxidation of chloride ions; the remaining choices do not describe an electrode reaction and cannot produce hydrogen.
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.
