Types of Reaction

There are Six main type of reactions 

Combustion :- oxygen combines with another compound to form water and carbon dioxide   

                        These reactions are exothermic, means produces heat 

                                   C₁₀H₈ + 12 O₂ ---> 10 CO₂ + 4 H₂O

  Synthesis          :- two or more simple compounds combine to form a more complicated one.

                                 

                               8 Fe + S₈ ---> 8 FeS

 Decomposition :- opposite of a synthesis reaction - a complex molecule breaks down to 

                                  make simpler ones.

2 H₂O ---> 2 H₂ + O₂

 Single displacement:  :-In this displacement of one atom or group of atom takes place

Mg + 2 H₂O ---> Mg(OH)₂ + H₂

 

 Double displacement::-In this displacement of two atoms or group of atoms takes place

Pb(NO₃)₂ + 2 KI ---> PbI₂ + 2 KNO₃

  

Acid-base: In This acid reacts with base to produce water 

HBr + NaOH ---> NaBr + H₂O