Chemistry - CHEMICAL BONDING Question with Solution | TestHub
When anions and cations approach each other, the valence shell of anions are pulled towards cation nucleus and thus, shape of anion is deformed. The phenomenon of deformation of anion by a cation is known as polarization and the ability of the cation to polarize the anion is called as polarizing power of cation. Due to polarization, sharing of electrons occurs between two ions to some extent and the bond shows some covalent character.
The magnitude of polarization depends upon a number of factors. These factors were suggested by Fajan and are known as Fajan’s rules.
(i) Greater the polarization in a molecule, more is the covalent character.
(ii) As the charge on cation increases, its tendency to polarize the anion increases.
(iii) As the size of the cation decreases or size of the anion increases, the polarization increases.
(iv) The cations with 18 electrons in the outermost shell bring greater polarization of the anion than those with inert gas configuration even if both the cations have same size and same charge.
Which is most volatile in nature?
Options:
Answer:
Solution:
AlCl₃ is most volatile due to its covalent character and smaller charge density, leading to weaker intermolecular forces.
