Which of the following is MOST likely to result in a hydrogen bond?

1)

A water molecule with another water molecule

2)

An ion with another ion

3)

A nonpolar molecule with a nonpolar molecule

4)

A polar molecule with a nonpolar molecule

A. Water molecule with another water molecule

Answer: A water molecule with another water molecule

Explanation:

A Water (H2O) molecule has two hydrogen atoms linked to an oxygen atom. And because hydrogen bond is formed when hydrogen is covalently linked to other elements like oxygen, where the oxygen tends to pull electrons to itself, resulting in dipole while hydrogen atom is partially positive and oxygen partially negative.

Thus, hydrogen bonds plays important role in molecules of water