1. | Partial ionic character of a covalent bond. |
2. | The number of lone pairs and bond pairs of electrons decide the shape of the molecules. |
3. | Delocalisation of electrons over two nuclei. |
4. | Shielding effect of electrons. |
Which of the following correctly represents the decreasing order of bond angles for NH₃, PH₃, NF₃, and PF₃?
1. NH3 > PH3 > NF3 > PF3
2. NH3 > NF3 > PH3 > PF3
3. NH3 > NF3 > PF3 > PH3
4. NH3 > PF3 > NF3 > PH3