Question

How do you test for an alkene?

Answer 1

The test for an alkene is summarized as follows:

1. The alkenes are the unsaturated hydrocarbons which contain $\mathrm{C}=\mathrm{C}$ bond.
2. For testing alkene, the Bromine water test is the standard test in which ${\mathrm{Br}}_2$ reacts with $\mathrm{C}=\mathrm{C}$ bond of an alkene.
3. The inference of the above test is the decolourisation of bromine water.

The figure below depicts the Bromine water test: