Question

Give a chemical test to differentiate between saturated and unsaturated hydrocarbons

Answer 1

Bromine water test... bromine water is brown, and can be decolourised by unsaturated hydrocarbons (due to the addition reaction of Br2 across the double or triple carbon-carbon bonds).

Answer 2

Bromine water test... bromine water is brown, and can be decolourised by unsaturated hydrocarbons (due to the addition reaction of Br2 across the double or triple carbon-carbon bonds). Saturated hydrocarbons do not react with bromine water in the absence of UV light, and so the brown colour persists.


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