Jwjwn uwhwwb jehwh Share with your friends Share 0 Aditi Gupta answered this Solution: Bond length of single bond is more than the bond length of double bond.When resonance occurs then the compound undergoes the partial double bond formation, which is slightly bigger in length as compared to double bond.In the I and II structure resonance occurs but, in the II structure there is extended resonance due to lone pair of nitrogen atom.Hence, bond length of II will be more than I because of less partial double bond character in II.Hence, the order is II > I > III 0 View Full Answer