Which problem is solved by adding a small amount of acid during electrolysis of water?
Answer and explanation
Correct answer: Low conductivity of pure water
Electrolysis requires the solution to conduct electric current. Pure or distilled water contains very few ions, so its electrical conductivity is too low for efficient electrolysis. Adding a small amount of a suitable acid increases the concentration of mobile ions, allowing current to pass and the water to decompose into hydrogen and oxygen. Therefore option B is correct; the other choices are not problems of electrical conduction.
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What is the correct answer to this question?
Low conductivity of pure water
Why is this the correct answer?
Electrolysis requires the solution to conduct electric current. Pure or distilled water contains very few ions, so its electrical conductivity is too low for efficient electrolysis. Adding a small amount of a suitable acid increases the concentration of mobile ions, allowing current to pass and the water to decompose into hydrogen and oxygen. Therefore option B is correct; the other choices are not problems of electrical conduction.
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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