What main products are obtained in the chlor-alkali process?
Answer and explanation
Correct answer: Chlorine, hydrogen and sodium hydroxide
The governing reaction is electrolysis of aqueous sodium chloride, or brine. Chloride ions are oxidised at the anode to form chlorine gas, while water is reduced at the cathode to form hydrogen gas and hydroxide ions. Sodium ions combine with hydroxide ions in solution to give sodium hydroxide. Therefore A lists all three main products; the other sets belong to unrelated processes.
Frequently asked questions
What is the correct answer to this question?
Chlorine, hydrogen and sodium hydroxide
Why is this the correct answer?
The governing reaction is electrolysis of aqueous sodium chloride, or brine. Chloride ions are oxidised at the anode to form chlorine gas, while water is reduced at the cathode to form hydrogen gas and hydroxide ions. Sodium ions combine with hydroxide ions in solution to give sodium hydroxide. Therefore A lists all three main products; the other sets belong to unrelated processes.
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.
