In a polar molecule, the ionic charge is 4.8 x 10-10 e.s.u. If the inter ionic distance is one Ao unit. then the dipole moment is

Given ionic charge =4.8×10−10 e.s.u. and ionic distance =1A∘=10−8cm we know that dipole moment =ionic charge x ionic distance =4.8 x 10-10x 10-8=4.8×10−10 e.s.u per cm=4.8 debye.