The electrical conductivity of an aqueous solution depends on the concentration of which particles in the solution 1) molecules 2) electrons 3)atoms 4)ions

Option (4) is the correct answer.

Explanation:

When a solution contains number of ions then this type of solution is able to conduct electricity.

For example, when NaCl is dissolved in water the NaCl dissociates into and ions. Hence, flow of these ions will be responsible for electrical conductivity.

Whereas flow of electrons in a conductor is responsible for electrical conductivity but in a solution ions are responsible for the flow of electrical current.

Thus, we can conclude that the electrical conductivity of an aqueous solution depends on the concentration of which particles in the solution ions.

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