Types of Chemical Reactions:

i). Combination Reaction
ii). Decomposition Reaction
a). Thermal Decomposition
b). Electrolytic Decomposition
iii). Displacement Reaction OR Substitution reaction
iv). Double Displacement Reaction
            a). Precipitation Reaction
            b). Neutralisation Reaction         
v).  Redox Reaction
vi). Oxidation Reaction
vii). Reduction Reaction
viii). Endothermic Reaction
ix). Exothermic Reaction


Explanation of Types with Reactions:

Combination Reaction:


The reactions in which two or more substances combine to form a new substance are called combination reaction. For example:

a).  2 Mg (s)   +    O2 (g)      Ã     2 MgO
     Magnesium      Oxygen           Magnesium oxide (White ash)
                                                      (basic) turns Red litmus blue
b). In the laboratory, iron sulphide is prepared by mixing iron and sulphur.                   
             Fe(s)   + S(s)    Ã     FeS(s)
c). Burning of carbon monoxide in oxygen to form carbon dioxide.    
              2CO (g)       +   O2(g)  Ã        2CO2 (g)
d).          CaO            +         H2O    Ã      Ca(OH)2
       Calcium Oxide           Water           Calcium Hydroxide
       (Quick Lime)                                    (Slaked Lime)

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