Which is the appropriate term used for a liquid or solution which conducts electricity along with some accompanying chemical changes?

The  term used is electrolytes. Electrolyte refers to the substance, which in fused state or in aqueous state conducts electricity. An electrolyte when dissolved in water dissociates into ions which makes it electrically conductive. In simple terms, the motion of ions furnished by the dissociation of an electrolyte cause the flow of electricity. For example NaCl, KCl, NaOH etc. The solution of an electrolyte in a polar solvent (usually water) is known as electrolytic solution.