Why is common salt considered a raw material for many chemicals?
Answer and explanation
Correct answer: Sodium hydroxide, chlorine and hydrogen can be obtained from it
The governing concept is the chlor-alkali process. Common salt, sodium chloride, is dissolved in water to make brine. Electrolysis of brine produces sodium hydroxide in solution, chlorine gas at the anode, and hydrogen gas at the cathode: 2NaCl + 2H₂O → 2NaOH + Cl₂ + H₂. Thus option A is correct; salt has many industrial uses and does not form only acids.
Frequently asked questions
What is the correct answer to this question?
Sodium hydroxide, chlorine and hydrogen can be obtained from it
Why is this the correct answer?
The governing concept is the chlor-alkali process. Common salt, sodium chloride, is dissolved in water to make brine. Electrolysis of brine produces sodium hydroxide in solution, chlorine gas at the anode, and hydrogen gas at the cathode: 2NaCl + 2H₂O → 2NaOH + Cl₂ + H₂. Thus option A is correct; salt has many industrial uses and does not form only acids.
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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