Question

when large size of anion the polarising pawer is increasing or decreasing ? why?​

Answer 1

Answer:

Polarization means  the outer most shell of anion  disturbs by cation due to its attraction towards the other electrons. Amount of deformation done to the outermost shell is called the polarizability of anion. Note that more the polarizability, more covalent bond in the compound.

The  order of polarizability of anions containg following type:

I> Br> Cl> F