Question

what is the primary intermolecular force that attracts water molecules to each other?
a dispersion forces
b ion - dipole forces
c hydrogen bonding
d dipole - dipole forces

Explanation:

Water ($H_2O$) has a bent molecular - shape with a highly electronegative oxygen atom and hydrogen atoms. Hydrogen bonding occurs when a hydrogen atom is covalently bonded to a highly electronegative atom (such as N, O, or F) and is attracted to another electronegative atom in a neighboring molecule. In water, the hydrogen - oxygen bonds are polar, and the hydrogen atoms of one water molecule are attracted to the oxygen atoms of other water molecules through hydrogen bonding. Dispersion forces are present in all molecules but are weaker in water compared to hydrogen bonding. Ion - dipole forces require the presence of ions, which are not relevant here as we are only considering water molecules. Dipole - dipole forces are also present in water, but hydrogen bonding is a stronger and more significant intermolecular force in water due to the large electronegativity difference between hydrogen and oxygen.

Answer:

C. hydrogen bonding