Q 1 explain n answer
When two oppositely charged ions approach each other closely, the positively charged cation attracts the outermost electrons of the anions and repels its positively charged nucleus. This results in the distortion or polarisation of the anion following some sharing of electrons between the two ions. i.e., the bond becomes partly covalent in character. So more the charge of the cation more will be the distortion. More will be the polarisation.