Question

what causes decomposition of water molecules

Answer 1

Because water is an extraordinarily stable compound it does not decompose easily. The process of electrolysis uses electricity to break bonds, causing decomposition of matter. Electricity is the flow of electrons, the negatively charged particles in atoms.

Answer 2

water molecules can be decomposed through the process of electrolysis as when the electricity is passed through acidified water It Breaks into ions in such a way that hydrogen gas is liberated at cathode and Oxygen gas is liberated at anode