Intermolecular forces Practice

Front

What are intermolecular forces?

Back

Intermolecular forces are the forces of attraction or repulsion between neighboring particles (molecules, atoms, or ions). They play a crucial role in determining the physical properties of substances.

Front

What is a polar molecule?

Back

A polar molecule is a molecule that has a net dipole moment due to the presence of polar bonds, which arise from the difference in electronegativity between the bonded atoms.

Front

Which type of intermolecular force occurs between polar molecules?

Back

Dipole-dipole attractions occur between polar molecules.

Front

What is the relationship between intermolecular forces and boiling point?

Back

The weaker the intermolecular forces of a substance, the lower the boiling point.

Front

What are London dispersion forces?

Back

London dispersion forces are weak intermolecular forces that arise from temporary dipoles in molecules, occurring in all molecules, whether polar or nonpolar.

Front

What is a hydrogen bond?

Back

A hydrogen bond is a strong type of dipole-dipole attraction that occurs when hydrogen is bonded to highly electronegative atoms like nitrogen, oxygen, or fluorine.

Front

Rank the following in order of strength: covalent bond, hydrogen bond, dipole-dipole attraction, London dispersion forces.

Back

Covalent bond > Hydrogen bond > Dipole-dipole attraction > London dispersion forces.

Front

What is the boiling point of a substance?

Back

The boiling point is the temperature at which a substance transitions from a liquid to a gas, influenced by the strength of its intermolecular forces.

Front

Why is bromine a liquid at room temperature while propane is a gas?

Back

Bromine has stronger intermolecular forces than propane, which accounts for its liquid state at room temperature.

Front

What is the effect of molecular polarity on boiling point?

Back

Molecules with greater polarity typically have higher boiling points due to stronger intermolecular forces.