The bond angles in `PH_(4)^(+)` are greater than that in `PH_(3)` - why ?

Explanation

In `PH_(3) ` there is a lone pair of electron over the P - atom which cause replultion with the three P - H bond pair . On the other hand the P - atom in `PH_(4)^(+)` ion contains no lone pair of electrons. Since lone pair - bond pair repulsions are stronger that bond pair - bond pair reulpsion , so H - P - H bond angles in `PH_(3)` is less than that in `PH_(4)^(+)`