Question

Why are drops of sulphuric acid added to water before electrolysis?

Answer 1

 Electrolysis of pure water is very low because water is an covalent compound so it can't ionize to release ions. To increase the conductivity of water a few drops of sulphuric acid is added .Being a strong acid it can ionize completely to release H+ions. These H+ ions are responsible for the conduction of electricity.