Will It Decolourise Bromine Water?

Bromine water is an orange solution of bromine. It becomes colourless when it is shaken with an alkene. Alkenes can decolourise bromine water, but alkanes cannot. The slideshow shows this process.

Which one will Decolourise bromine water?

Solution: Butyne, Ethene and Hexyne, all can decolourise bromine water.

Which compound will Decolourise bromine water Fastest?

Answer: Alkene decolorizes bromine water so it is often used as a test for unsaturated hydrocarbon.