A) 2-butene
B) Benzene
C) 1-butene
D) 1-propyne
Correct Answer: B
Solution :
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 \[C=C\,(1.34\,\text{{ }\!\!\mathrm{\AA}\!\!\text{ }})\]
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