Intermolecular Forces

Front

What are intermolecular forces?

Back

Intermolecular forces are the forces of attraction or repulsion between neighboring particles (molecules, atoms, or ions). They are responsible for the physical properties of substances, such as boiling and melting points.

Front

What is the strongest type of intermolecular force?

Back

Covalent bonds are the strongest type of intermolecular force, followed by hydrogen bonds, dipole-dipole attractions, and London dispersion forces.

Front

What type of intermolecular force is present in water?

Back

Water exhibits hydrogen bonding, which is a strong type of dipole-dipole attraction.

Front

How do London dispersion forces arise?

Back

London dispersion forces arise from temporary fluctuations in electron distribution within molecules, leading to temporary dipoles that induce attraction between molecules.

Front

What is the boiling point of a substance indicative of?

Back

The boiling point of a substance is indicative of the strength of its intermolecular forces; higher boiling points generally indicate stronger intermolecular forces.

Front

Which substance has the weakest intermolecular forces: Substance A (boiling point 100 °C), Substance B (boiling point 50 °C), or Substance C (boiling point 25 °C)?

Back

Substance C, with a boiling point of 25 °C, has the weakest intermolecular forces.

Front

What type of intermolecular forces are present in CO2?

Back

CO2 exhibits London dispersion forces, as it is a nonpolar molecule.

Front

What is the order of strength for the following intermolecular forces: London forces, dipole-dipole attraction, hydrogen bond, covalent bond?

Back

The order of strength is: covalent bond > hydrogen bond > dipole-dipole attraction > London forces.

Front

What type of intermolecular force is present in Cl2?

Back

Cl2 exhibits dispersion forces, as it is a nonpolar molecule.

Front

What is the significance of hydrogen bonding in biological systems?

Back

Hydrogen bonding is crucial in biological systems as it helps maintain the structure of proteins and nucleic acids (like DNA) and influences the properties of water.