Which correct product set is obtained by electrolysis of brine in the chlor-alkali process?
Answer and explanation
Correct answer: Sodium hydroxide, chlorine, and hydrogen
Brine is concentrated aqueous sodium chloride. During electrolysis, chloride ions are oxidised at the anode to chlorine gas, water is reduced at the cathode to hydrogen gas, and sodium hydroxide remains in solution. The overall reaction is 2NaCl + 2H2O → 2NaOH + Cl2 + H2. Therefore option A is the correct product set.
Frequently asked questions
What is the correct answer to this question?
Sodium hydroxide, chlorine, and hydrogen
Why is this the correct answer?
Brine is concentrated aqueous sodium chloride. During electrolysis, chloride ions are oxidised at the anode to chlorine gas, water is reduced at the cathode to hydrogen gas, and sodium hydroxide remains in solution. The overall reaction is 2NaCl + 2H2O → 2NaOH + Cl2 + H2. Therefore option A is the correct product set.
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.
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