Why does electric current pass more easily when a small amount of dilute acid is added during the electrolysis of water?
Answer and explanation
Correct answer: The acid forms ions in water and increases the number of mobile charge carriers.
Pure water has a very low concentration of ions due to self-ionisation, so it is a poor conductor of electricity. Adding a dilute acid increases the number of mobile cations and anions that carry charge through the solution. Therefore, electric current passes more easily. Option B is incorrect because acid does not convert water molecules into electrons; conduction in the solution occurs through ions.
Frequently asked questions
What is the correct answer to this question?
The acid forms ions in water and increases the number of mobile charge carriers.
Why is this the correct answer?
Pure water has a very low concentration of ions due to self-ionisation, so it is a poor conductor of electricity. Adding a dilute acid increases the number of mobile cations and anions that carry charge through the solution. Therefore, electric current passes more easily. Option B is incorrect because acid does not convert water molecules into electrons; conduction in the solution occurs through ions.
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.
