Chemical decomposition is the breakdown of complex molecules into simpler substances.
In biology, it refers to the breakdown of organic animal and plant tissues into the elements and compounds that can be used by other lifeforms.
Decomposition reaction is the opposite of synthesis decomposition reaction is where one single compound breaks down into two or more simpler substances. An example of this is the decomposition of zinc carbonate, represented by the equation:ZnCO3(s) ZnCO(s) + CO2(g)
Another example of decomposition is as follows:
AB -> A+B