Question

in the electrolysis of water what would happen if Dil H2 S o4 is not added to water

Answer 1

if Dil h2so4 is not added to water
the water is not much reactive we mix dil h2so4 to increase it's reactivity
hope it helps you

Answer 2

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.