Which pair of molecules has hydrogen bonding interactions?

Question

a) HF, NH3

 

b) NH3,CH4

 

c)CO2, CO2

 

 

d)CH4 ,CH4

 

e)CH4 ,CO2

Answer 1

Choice A only. 

 

Hydrogen bonding is a special, subset of dipole-dipole intermolecular attractions that only occurs between polar molecules that have a dipole (or separation of charge) between a Hydrogen atom and a very electronegative Fluorine, Nitrogen, or Oxygen atom (sometimes Chlorine). Because there's such a big difference in electronegativity between these atoms, the dipole is particularly stark, creating a strong electrostatic attraction between neighboring molecules.