What main products are obtained by electrolysis of brine in the chlor-alkali process?
Answer and explanation
Correct answer: Chlorine, hydrogen and sodium hydroxide
The governing concept is electrolysis of brine, an aqueous solution of sodium chloride. At the anode, chloride ions are oxidised to chlorine gas; at the cathode, water is reduced to hydrogen gas and hydroxide ions. The remaining sodium ions combine with hydroxide ions to form sodium hydroxide. Thus the three main products are chlorine, hydrogen, and sodium hydroxide, making option A correct. The other combinations are unrelated products.
Frequently asked questions
What is the correct answer to this question?
Chlorine, hydrogen and sodium hydroxide
Why is this the correct answer?
The governing concept is electrolysis of brine, an aqueous solution of sodium chloride. At the anode, chloride ions are oxidised to chlorine gas; at the cathode, water is reduced to hydrogen gas and hydroxide ions. The remaining sodium ions combine with hydroxide ions to form sodium hydroxide. Thus the three main products are chlorine, hydrogen, and sodium hydroxide, making option A correct. The other combinations are unrelated products.
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.
