NY Regents Chemistry Exam August 2023 Question 20
20. Which term identifies the strong intermolecular forces found in a sample of liquid water?
(1) ionic bonding
(2) covalent bonding
(3) hydrogen bonding
(4) metallic bonding
Solution: Intermolecular forces are forces of attraction between molecules. Let's review different intermolecular forces.
Hydrogen bonding = exists between molecules that have OH, NH or FH bonds. For example: NH3, H2O. These are strong intermolecular forces.
Dipole-dipole = exists between polar molecules. A polar molecule is asymmetrical. Example of polar molecules: NH3, HBr.
London Dispersion forces = theses intermolecular forces are present between all molecules. However, these are the only intermolecular forces between nonpolar molecules. Nonpolar molecules are symmetrical. Dispersion forces are the weakest intermolecular forces.
Water has hydrogen bonding (choice 3).
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