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Electrolysis of water is the process in which electricity is used to split molecules. Water is made of H2O and theres are two hydrogen atoms attached to one oxygen atom.
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When electric current is introduced into water it breaks down the components of water ,i.e., hydrogen and oxygen. Hydrogen molecules are 2 and oxygen is 1. So water is collected in the tubes in the ration 2:1 . This is known as electrolysis of water.
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