Question

why does an aqueous solution of an acid conduct electricity ?​

Answer 1

Acids undergo dissociation in aqueous solution to form H+ ions. When electricity is passed through an aqueous solution of an acid, the H+ ions reach the cathode and each H+ ion picks up one electron from the cathode to form H2 gas. Because of this reaction, an aqueous solution of acid conducts electricity.

Answer 2

acid conducts electricity in an aqueous solution because it dissociates into H+ ions in water which conducts electricity.