Question

Why do we add a few drops of dil H2 so4 in
electrolysis of water​

Answer 1

Answer:

Because water is an insulator. 100% pure water doesn't conduct electricity very well at all. When acid such as sulfuric acid (H2SO4) is added, the compounds separate into separate ions and having that small number of ions increases conductivity astronomically. This doesn't require an acid, you can use a base or almost any compound. Even normal tap water has enough ions to be a good conductor, which is necessary to efficiently perform electrolysis