The test which is used for identifying the unsaturation in the carbon compounds is_______.

The test used for identifying the unsaturation in carbon compounds is known as the Bromine Test. In this test, bromine (Br₂) in a non-polar solvent, such as carbon tetrachloride (CCl₄), is added to the compound. Unsaturated compounds, like alkenes and alkynes, will react with bromine, resulting in the decolorization of the reddish-brown bromine solution. This reaction indicates the presence of double or triple bonds in the carbon compounds.

Overall, this test is widely used in organic chemistry to quickly assess the degree of unsaturation and is based on the electrophilic addition of bromine to the double or triple bonds in unsaturated hydrocarbons.