You are given samples of ethane, ethene and ethyne in three different containers. How will you distinguish them?
(i) A small portion of each given sample is treated separately, with Br2/CCl4. The sample which does not decolourise is ethane. Because ethene and ethyne both form product with Bromine.
(ii) The remaining two samples which decolourise bromine are treated separately with ammoniacal solution of silver nitrate. The sample which produces white precipitate is ethyne. Thus, the third sample is clearly ethene.
Benzene ring has three double bonds in it but is still quite stable. Explain.
Or
Why is benzene extra-ordinary stable though it contains three double bonds?