Question

PH3 has lower boiling point then NH3. why?

Answer 1

NH3 molecules are associated with each other by extensive inter molecular H-bonding whereas ph3 molecules are associated with each other by weak wander wall forces, that's why boiling point of NH3 is higher than PH3

Answer 2

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

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