The given reaction is the reaction between sugar and sulphuric acid
When concentrated sulphuric acid is added to sugar, it dehydrates the sugar to form carbon dioxide and water along with the liberation of sulphur dioxide SO2 gas.
This reaction is an example of a dehydration reaction because sulphuric acid is used to dehydrate sugar.
The product of the given reaction is Sulphur dioxide SO2, steam H2O, and carbon dioxide gas CO2.