Which process is used to prepare sodium hydroxide from sodium chloride?
Answer and explanation
Correct answer: Chlor-alkali process
In the chlor-alkali process, an aqueous solution of sodium chloride, called brine, is electrolysed. The products include sodium hydroxide in solution, chlorine gas at the anode, and hydrogen gas at the cathode. Thus option A names the correct industrial process. Rusting is corrosion, photosynthesis is a biological food-making process, and combustion is reaction with oxygen; none of these produces sodium hydroxide from brine.
Frequently asked questions
What is the correct answer to this question?
Chlor-alkali process
Why is this the correct answer?
In the chlor-alkali process, an aqueous solution of sodium chloride, called brine, is electrolysed. The products include sodium hydroxide in solution, chlorine gas at the anode, and hydrogen gas at the cathode. Thus option A names the correct industrial process. Rusting is corrosion, photosynthesis is a biological food-making process, and combustion is reaction with oxygen; none of these produces sodium hydroxide from brine.
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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