Question

why colour of bromine water discharge on adding ethene in it?

Answer 1

Answer:

Answer: Why does bromine water become colourless upon the addition of ethene, but not ethane? ... Bromine water reacts with ethane as it is able to break open the double bond, forming 1,2-dibromoethane. This double bond is not present in ethane, so bromine water does not react with it.

Answer 2

Answer:

Bromine water becomes colourless after adding ethene to it because it reacts with the ethane as it is able to break open the double bond which then in term forms 1-2 diobromoethene. This bond isn't present in the ethene which the bromine water doesn't react with.

Explanation:

(I hope the explanation is clear)