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Each carbon has a single hydrogen atom attached to it. The lines in this figure represent the Ï bonds in benzene. The basic ring structure is composed of Ï bonds formed from overlap of sp2 hybrid orbitals on adjacent carbon atoms. The unhybridized carbon pz orbitals project above and below the plane of the ring.
1. Sigma Bond: A single bond is formed between two atoms by overlapping of orbitals along the same axis is known as sigma bond e.g. formation of bonding shown below: Since in such system maximum overlapping is possible hence bond is strong bond.