What is the main purpose of adding a few drops of dilute sulphuric acid during the electrolysis of water?
Answer and explanation
Correct answer: To increase the low electrical conductivity of pure water
Pure water contains very few ions, so it conducts electricity poorly and electrolysis proceeds very slowly. Adding dilute sulphuric acid supplies \(\mathrm{H^+}\) and other ions, increasing the electrical conductivity of the solution so that current can pass. The acid is added to improve conduction, not to increase the amount of oxygen produced.
Frequently asked questions
What is the correct answer to this question?
To increase the low electrical conductivity of pure water
Why is this the correct answer?
Pure water contains very few ions, so it conducts electricity poorly and electrolysis proceeds very slowly. Adding dilute sulphuric acid supplies \(\mathrm{H^+}\) and other ions, increasing the electrical conductivity of the solution so that current can pass. The acid is added to improve conduction, not to increase the amount of oxygen produced.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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