Where is sodium hydroxide obtained in the chlor-alkali process?
Answer and explanation
Correct answer: In the solution
The governing concept is electrolysis of brine. Sodium chloride solution contains Na+, Cl−, water, and supporting ions. Chlorine gas is released at the anode, while hydrogen gas is formed at the cathode from water. The remaining Na+ and OH− ions stay in the aqueous phase and form sodium hydroxide in the solution. Therefore option A is correct. NaOH is not obtained as an anode gas or as solid sodium metal at the cathode.
Frequently asked questions
What is the correct answer to this question?
In the solution
Why is this the correct answer?
The governing concept is electrolysis of brine. Sodium chloride solution contains Na+, Cl−, water, and supporting ions. Chlorine gas is released at the anode, while hydrogen gas is formed at the cathode from water. The remaining Na+ and OH− ions stay in the aqueous phase and form sodium hydroxide in the solution. Therefore option A is correct. NaOH is not obtained as an anode gas or as solid sodium metal at the cathode.
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.
