Question
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?
Solution
In the case of benzene, the 
-electrons are delocalised throughout the whole molecule. This delocalisation of 
-electron clouds above and below the plane of benzene ring causes a decrease in energy and hence increases the stability of benzene molecule.
-electrons are delocalised throughout the whole molecule. This delocalisation of -electron clouds above and below the plane of benzene ring causes a decrease in energy and hence increases the stability of benzene molecule.
