# Which process is used to separate Hydrogen and Oxygen from Water?

What's the process called where you can use electricity to separate the oxygen and hydrogen from water? Is it electrolysis? Can it be applied to other liquids?

Problem in your question: should be be O and H, because $\ce{H2O}$ (water) is made of H (Hydrogen) and O (Oxygen). $\ce{CO2}$ is carbon dioxide, for reference.