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                       Decomposition reaction:
                       The reaction in which a substance breaks down into two or more substances
                       is known as the decomposition reaction.
                       When electrolysis of water is taking place it decomposes in to hydrogen and
                       oxygen.
                       Chemical equation for electrolysis of water is
                       Water                                  Hydrogen       +       Oxygen
                       H2O                                           H2                           O2



























                          PIC------Electrolysis of water
                       Combination Reaction:
                       The chemical reaction in which two or more substances(reactants) are
                       combined to form a complex compound is called a combination reaction.
                       When carbon is burns in oxygen, carbon di oxide I formed.
                       Chemical equation.
                       Carbon      +      Oxygen                                    Carbon dioxide

                            C                      O 2                                                                    CO2





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