Answers

2016-02-27T19:45:30+05:30
When u add bromine water and carbon tetra chloride to each of them, ethane does not react, while ethane decolorises the solution.
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2016-02-27T19:53:37+05:30
Addition of bromine water to both alkane and alkene. In which ever case colour changes that compound is ethene (alkene).
Ethane   :  CH₃ - CH₃
Ethene   :   CH₂ =CH₂
CH₃ - CH₃ + Br₂ → no reaction                : no colour change
CH₂ =CH₂ + Br₂ → CH₂(Br) - CH₂(Br)         :  colour change
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