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

Name the main types of intermolecular forces.

Back

1. Hydrogen bonding 2. Dipole-dipole interactions 3. London dispersion forces

Front

What is hydrogen bonding?

Back

Hydrogen bonding is a strong type of dipole-dipole interaction that occurs when hydrogen is bonded to highly electronegative atoms like nitrogen, oxygen, or fluorine.

Front

What are dipole-dipole interactions?

Back

Dipole-dipole interactions are attractive forces between the positive end of one polar molecule and the negative end of another polar molecule.

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, regardless of polarity.

Front

Which type of intermolecular force is the weakest?

Back

London dispersion forces are generally the weakest type of intermolecular force.

Front

How do intermolecular forces affect boiling points?

Back

Substances with stronger intermolecular forces typically have higher boiling points compared to those with weaker intermolecular forces.

Front

What is the relationship between molecular size and London dispersion forces?

Back

Larger molecules have more electrons and a greater surface area, leading to stronger London dispersion forces.

Front

Which molecule can only exhibit London dispersion forces?

Back

I2 (iodine) can only exhibit London dispersion forces.

Front

What is the boiling point trend for hydrocarbons (alkanes)?

Back

As the number of carbon atoms in alkanes increases, the boiling point generally increases due to stronger London dispersion forces.