In NO3– ion, the number of bond pair and lone pair of electrons on nitrogen atom are respectively:
1. | 2, 2 | 2. | 3, 1 |
3. | 1, 3 | 4. | 4, 0 |
The incorrect statements among the following for sigma- and pi- bonds formed between two carbon atoms is:
1. | Sigma-bond is stronger than a pi-bond |
2. | Bond energies of sigma- and pi-bonds are of the order of 264 KJ/mol and 347 KJ/mol, respectively |
3. | Free rotation of atoms about a sigma bond is allowed but not in the case of a pi-bond |
4. | Sigma-bond determines the direction between carbon atoms but a pi-bond has no primary effect in this regard |