The test for unsaturated compounds
1 mark · EasyWhat is the chemical test used to distinguish between an alkane and an alkene?
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
Add bromine water and observe if it is decolourised.
Also accept: Add bromine water; Shake with bromine water
Common mistakes: Use litmus paper; Use limewater
Show mark scheme and worked solution
Marking points
B1 · 1 mark · States the correct test: use bromine water/bromine solution, added to the sample.
Worked solution
The test is to add bromine water to the substance and see if the orange colour is removed (decolourised). Only alkenes will do this.