Question

Why PH3 has low boiling point than NH3?

Answer 1

Although PH3 is a larger molecule with greater dispersion forces thanammonia, NH3 has very polar N-H bonds leading to strong hydrogen bonding. This the dominant intermolecular force and results in a greater attraction between NH3molecules than there is between PH3molecules.

Answer 2

$\huge\boxed{\underline{\mathcal{\red{A}\green{N}\pink{S}\orange{W}\blue{E}\purple{R}}}}$

❤⭐..REASON:-..⭐❤

• ❤.. Unlike ${NH3,PH3}$ molecules are not associated through hydrogen bonding in liquid state.
• ❤.. That is why the boiling point of ${PH3}$ is lower than${NH3}$.