Answer:
Bromine solution in
CCI, has an orange colour. When it is added drop wise to ethene, the orange
colour disappears due to the formation of the colourless ethylene dibromide.
This reaction is not shown by ethane as it is addition reaction.
The two can
be distinguished also by subjecting them to the flame. Saturated hydrocarbon (ethane)
generally gives a clear flame while unsaturated hydrocarbon (ethene) gives a yellow
flame with lots of black smoke.
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