Why do dilute acids conduct electricity?
Answer and explanation
Correct answer: They contain free ions
An electric current in a solution requires mobile charged particles. When an acid is diluted with water, it ionises to form hydronium ions and corresponding negative ions; for example, HCl + H₂O → H₃O⁺ + Cl⁻. These ions move toward opposite electrodes and carry charge through the solution. Colour, sour taste, or temperature does not produce electrical conduction. Therefore the presence of mobile ions makes option A correct.
Frequently asked questions
What is the correct answer to this question?
They contain free ions
Why is this the correct answer?
An electric current in a solution requires mobile charged particles. When an acid is diluted with water, it ionises to form hydronium ions and corresponding negative ions; for example, HCl + H₂O → H₃O⁺ + Cl⁻. These ions move toward opposite electrodes and carry charge through the solution. Colour, sour taste, or temperature does not produce electrical conduction. Therefore the presence of mobile ions makes option A correct.
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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