Phosphorus cannot form `PH_(5)` with its outer electronic configuration as `3s^(3)3p^(3)` because

Options

A. phosphorus cannot show +5 oxidation state
B. `PH_(5)` is not a stable compound
C. `Delta_(a)H` value of dihydrogen and `Delta_(eg)H` value of hydrogen do not favour higher oxidation state of phosphorus
D. phosphorus is not very reactive hence does not form `PH_(5)`

Answer

C

Explanation

Since higher oxidation state of P is not favoured. By high `Delta_(a)H` of dihydrogen and `Delta_(eg)H` of hydrogen, P does not form `PH_(5)` though it exhibits + 3 and + 5 oxidation states.