Will C2H4 Decolourise Bromine Water?

Alkenes can decolourise bromine water, but alkanes cannot. The slideshow shows this process. Hydrogen can be added to a C=C double bond. This has the effect of 'saturating' the molecule, and will turn an alkene into an alkane.

Which compound can Decolourise bromine water?

Ethene, butyne, and hexyne can decolourize bromine water. The bromine loses its unique red-earthy colored tone to give a dry fluid. The decoloration of bromine is frequently utilized as a test for C−C twofold and triple bond.

Which compound will not Decolourise bromine water?

Alkanes are saturated hydrocarbons, which does not decolourise the bromine water.