An organic compound reacts with cu2cl2 and also decolourises br2 water is
Answers
Alkenes and alkynes both decolourise bromine water, but only alkynes , containing terminal H atom reacts with ammonical cuprous chloride solution.
Answer:
An organic compound that decolourizes Bromine water and also reacts with Cu₂Cl₂ will be ethyne or a terminal alkyne.
Explanation:
An organic compound that decolorizes bromine water from brown color to colourless will be an unsaturated hydrocarbon i.e. either alkene with Carbon-Carbon double bond or an Alkyne with Carbon- Carbon triple bond.
If the same hydrocarbon reacts with ammoniacal Cu₂Cl2₂ then it is either ethyne or any terminal alkyne.
When ethyne is passed through an ammoniacal solution of Cu₂Cl₂ , a red brown precipitate of Copper(II)chloride is formed.
H-C≡C-H + 2Cu₂Cl₂ + 2NH₃ → Cu-C≡C-Cu + NH₄Cl
Cu-C≡C-Cu is the red brown precipitate.
Terminal alkynes will also react to form a red brown precipitate.
Non terminal alkynes do not have an acidic Hydrogen atom so will not react with ammoniacal Cu₂Cl₂.
red-brown ppt
+
2NH