In case of nitrogen, `NCl_(3)` is possible but not `NCl_(5)` while in case of phosphorous, `PCl_(5)` are possible. It is due to

Options

A. availability of vacant d orbitals in P but not in N
B. lower electronegativity of P than N
C. lower tendency of H - bond formation in P than N
D. occurrence of P in solid while N in gaseous state at room temperature

Answer

A

Explanation

N does not have d-orbital `(1s^2 2s^2 2p^3)`
whereas P have d-orbital `(1s^2 2s^2 2p^6 3s^2 3p^3)`