Chemistry - Electrochemistry Question with Solution | TestHub

Electrical conductivity of a solution depends on the concentration of free ions present in it.

Distilled water is a very poor conductor of electricity due to the negligible concentration of $H^{+}$ and $O{H}^{-}$ ions.

Sugar and alcohol are covalent compounds and do not dissociate into ions when dissolved in water. Hence, their solutions are non-electrolytes and do not conduct electricity.

Salt is an ionic compound and a strong electrolyte. It completely dissociates into its constituent ions in an aqueous solution, providing a large number of free ions for the conduction of electricity.

Thus, the salt solution will have the highest electrical conductivity.

Answer: Salt solution