EVERYDAY SCIENCE

Detailed explanation-1: -But, liquid alkenes like cyclohexene react with bromine water solution in the presence of tetrachloromethane.

Detailed explanation-2: -This allows us to distinguish alkenes from alkanes using a simple chemical test. 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.

Detailed explanation-3: -You can use bromine water, which is an orange solution, to distinguish between alkanes and alkenes. There is no change when bromine water is mixed with an alkane, but it turns colourless when mixed with an alkene.

Detailed explanation-4: -A simple test with bromine water can be used to tell the difference between an alkane and an alkene. An alkene will turn brown bromine water colourless as the bromine reacts with the carbon-carbon double bond.

Detailed explanation-5: -A sensitive test for bromine is the reaction with fluorescein to give a deep red colour caused by bromination of the organic molecule, or by its reaction with fuchsine dyes in the presence of sulfurous acid, to give a deep blue colour.