Types Of Reaction

How many types of chemical reaction?

1)
Reversible reaction    :

It is the reaction that can go forward and backward at the same time.
It will use the sign,  , to show that it is reversible. It has to occur 
in closed system and results in occurring of equilibrium

                                   
 e.g.

Reference : http://www.revisescience.co.uk/2010/schools/ilford/acequations.asp

Reference : http://dl.clackamas.edu/ch105/lesson7equilbria_lechatelier.html

2)Irreversible reaction  :

It is the reaction that can go forward only. It shows by using the sign , 
, to show that it is irreversible. Equilibrium will never occur in this kind of reaction.

                                   
 e.g.

Reference : http://jino-ultraman.blogspot.com/2009/12/irreversible-chemical-reactions.html

Reference : http://en.wikipedia.org/wiki/Combustion

Video From : http://www.youtube.com/watch?v=br8lKynV1Hc