Question

PCl₅ is formed NCI₅ is not formed why?

(1) Phosphorous has vacant d-orbitals while nitrogen do not have vacant d-orbitals

(2) PCl₅ is stable while NCI₅ is unstable

(3) Phosphorous is more reactive while nitrogen is inert

(4) Phosphorous has large size while nitrogen has small size.

Answer 1

Correct option is (1) Phosphorous has vacant d-orbitals while nitrogen do not have vacant d-orbitals

Nitrogen do not have vacant d-orbitals so it do not expands it's octet, while phosphorous have vacant 3d orbitals so it can expands it is octet.