If a solid line represents a covalent bond and a dotted line represents intermolecular attraction, which of the choices shows a hydrogen bond?

Question

If a solid line represents a covalent bond and a dotted line represents intermolecular attraction, which of the choices shows a hydrogen bond?

a) H4C......H-F

B) H3N......H-O-H

C) H2O⋅⋅⋅⋅⋅⋅H−CH3

D)H−H

Answer 1

B) H3N......H-O-H would be the only one representing a hydrogen bond because hydrogen bonds occur when H is bonded to N, O or F. In (B), you have H bonded to O in H-O-H and to N in H3N. So, you can have hydrogen bonding.