a chemical test to differentiate between ethene and ethyne
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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 changeCH₂ =CH₂ + Br₂ → CH₂(Br) - CH₂(Br)
: colour change
Ethane : CH₃ - CH₃
Ethene : CH₂ =CH₂ CH₃ - CH₃ + Br₂
→ no reaction
: no colour changeCH₂ =CH₂ + Br₂ → CH₂(Br) - CH₂(Br)
: colour change
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