• # question_answer In which of the following, the bond length between carbon and carbon atom is equal [CPMT 1997] A) 2-butene B) Benzene C) 1-butene D) 1-propyne

In benzene due to resonance all the carbon-carbon bond lengths are equal 1.39Å which is between $C-C\,(1.54\,\text{{ }\!\!\mathrm{\AA}\!\!\text{ }})$ and $C=C\,(1.34\,\text{{ }\!\!\mathrm{\AA}\!\!\text{ }})$