Why is electrolysis of brine important in the chlor-alkali process?
Answer and explanation
Correct answer: It produces sodium hydroxide, chlorine, and hydrogen
The governing concept is electrolysis of concentrated aqueous sodium chloride, or brine. At the anode, chloride ions are oxidised to chlorine; at the cathode, water is reduced to hydrogen and hydroxide ions. The remaining sodium ions combine with hydroxide ions to form sodium hydroxide. Therefore option A lists all three useful products, while the other choices omit or misidentify them.
Frequently asked questions
What is the correct answer to this question?
It produces sodium hydroxide, chlorine, and hydrogen
Why is this the correct answer?
The governing concept is electrolysis of concentrated aqueous sodium chloride, or brine. At the anode, chloride ions are oxidised to chlorine; at the cathode, water is reduced to hydrogen and hydroxide ions. The remaining sodium ions combine with hydroxide ions to form sodium hydroxide. Therefore option A lists all three useful products, while the other choices omit or misidentify them.
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.
