Question

why does an aqueous solution of an acid conduct electricity?

Answer 1

As said by your friends, an aqueous solution of an acid conducts electricity because of the presence of H+ ions in solution. The hydrogen ion is a charged species and its movement causes the flow of current.

Answer 2

Answer:-

Charged particles are responsible for the conductance of electricity in an acid. These charged particles called as ions are the reason behind conductance of electricity in acid