Question

pcl5 is more covalent than pcl3 ' explain?

Answer 1

$Pc l_{5}$ is non polar molecule because individual dipole moments of P-Cl bond cancel out each other on the other hand $Pc l_{3}$ is a polar molecule. So $Pc l_{5}$ is more covalent than $Pc l_{3}$

Answer 2

Hey !!

The oxidation state of P in PCl₅ is +5 and that in PCl₃ is +3. Since elements in the +5 oxidation state have less tendency to lose electrons than in the +3 oxidation state, therefore, P in the +5 oxidation state has more tendency to share its electrons with Cl than in the +3 oxidation state. Thus, PCl₅ is more covalent than PCl₃.

Hope it helps you !!