What is decomposition reaction? Explain with example.

A decomposition reaction is a chemical reaction in which one single compound splits into multiple simpler substances under suitable conditions.
Carbonic acid (H2CO3) is an ingredient of soft drinks. When carbonic acid breaks down to produce water (H2O) and carbon dioxide (CO2),  a decomposition reaction takes place. Therefore when we open a can of soft drink some of the carbon dioxides fizzes out.
The equation for this reaction is:
                                            H2CO3 --------> H2O + CO2   


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