a gaseous hydrocarbon,P,with three carbon atoms,decolorises bromine water.
a)Explain what the decolorisation of the bromine water tests for.
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Distinguishing alkanes from alkenes
Explanation:
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.
source - https://www.bbc.co.uk/bitesize/guides/zb6bcj6/revision/3#:~:text=This%20allows%20us%20to%20distinguish,bromine%20water%2C%20but%20alkanes%20cannot.
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