Which of the following substances will have the strongest intermolecular forces?
a) h2s
b) co
c) hcl
d) ar
e) ch3nh2

and

as pure molecular solids, which of the following exhibits dipole-dipole intermolecular forces: ph3, so3, hcl and co2
a) so3 and co2
b) so3, hcl and co2
c) ph3 and hcl
d) ph3 only
e) hcl only