InterviewSolution
Saved Bookmarks
InterviewSolution
| 1. |
White phosphorus exists asA. `P_(8)` moleculesB. `P_(4)` moleculesC. `P_(2)` moleculesD. `P_(6)` molecules |
|
Answer» Correct Answer - 2 White phosphorus , a solid at room temperature is soft, waxy and reactive. It exists as tetrahedral `P_(4)` molecules, and the tetrahedral structure remains in the liquid and gaseous state. Above `800^(@)C P_(4)` moleculesin the gas begin to dissocaite into `P_(2)` which have a bond enthalpy of `489.6" kJ mol"^(-1)`. This is only half the value for`N equiv N` because the orbitals in the third shell are much large and give relatively poor `p_(pi)-p_(pi)` overlap. |
|