Which process is used to obtain sodium hydroxide from common salt?
Answer and explanation
Correct answer: Chlor-alkali process
Common salt, sodium chloride, is dissolved in water to prepare brine. During electrolysis of brine, chloride ions form chlorine at the anode, hydrogen is produced at the cathode, and sodium hydroxide remains in solution. Because the process produces chlorine and an alkali, it is called the chlor-alkali process. Crystallisation and evaporation only separate substances physically, while acid rain is unrelated. Hence, option B is correct.
Frequently asked questions
What is the correct answer to this question?
Chlor-alkali process
Why is this the correct answer?
Common salt, sodium chloride, is dissolved in water to prepare brine. During electrolysis of brine, chloride ions form chlorine at the anode, hydrogen is produced at the cathode, and sodium hydroxide remains in solution. Because the process produces chlorine and an alkali, it is called the chlor-alkali process. Crystallisation and evaporation only separate substances physically, while acid rain is unrelated. Hence, option B is correct.
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.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
