In each of the following pairs of compounds, Identify the one with more covalent nature and why ? LiBe and LiI

In each of the following pairs of compounds, Identify the one with mor

1.	In each of the following pairs of compounds, Identify the one with more covalent nature and why ? LiBe and LiI
Answer» Solution :According to Fajan's rule, LI I in more covalent than LiBr. Since `I^(-)` is larger in size than `Br^(-)`, the larger sized anion PULLS the CATION EFFECTIVELY towards the nucleus. This results in more polarisation effect . GREATER the polarisation effect greater will be the covalent character .