Question

Which of the following exhibits dipole-dipole forces as its strongest intermolecular force?
Question 1 options:

a) NH3
b) CH4
c) BCl3
d) CO2
e) H2

state why?

Answer 1

a) NH3

NH3 exhibits dipole-dipole forces as its strongest intermolecular force because it is a polar molecule. The ammonia molecule has a lone pair of electrons on the nitrogen atom and a partial positive charge on the hydrogen atoms. This asymmetrical distribution of charge creates a permanent dipole moment, resulting in dipole-dipole interactions between NH3 molecules.