07. THE P-BLOCK ELEMENTS (HM)
Explanation:
As we from top to bottom in a group the dipole moment of hydrides of the elements of that particular group decreases dye to increase in the size of the element
So the order of dipole moment of the given hydrides
\(NH _3\,>\, PH _3\,>\, AsH _3\,>\, SbH _3\)