give reason
-
NH3 exhibits hydrogen bonding in addition to dispersion forces. This significantly increases the intermolecular force, and raises the boiling point. PH3 does not exhibit hydrogen bonding and the dominant intermolecular force holding these molecules together is dispersion forces. (Dispersion forces also known as Van Der Waal Force). Hydrogen bonding takes more energy to break than dispersion forces and therefore gives ammonia the higher boiling point.
-
It can hydrogen bond, and phosphine can't.
-
hydrogen bonding = the force of attraction between the polar bonds on hydrogen atoms within molecules