Which of the following is the weakest type of intermolecular force?

• Hydrogen bonding

• Dipole–dipole interaction

• London dispersion force

• Ion–dipole interaction

Which molecule has the strongest dipole–dipole interaction?

• H₂

• CH₄

• HCl

• O₂

Intermolecular forces are generally stronger than covalent bonds.

Which factor increases the strength of London forces?

• Smaller molar mass

• Symmetrical spherical shape

• Larger molecular size

• Lower molecular size

London dispersion forces are caused by instantaneous dipoles in molecules.

Which of the following pairs exhibits hydrogen bonding?

• H₂ and O₂

• HF and HF

• CH₄ and CH₄

• CO₂ and CO₂

Elongated molecules generally have stronger van der Waals forces than spherical ones.

Which has the highest boiling point due to strong intermolecular forces?

• H₂S

• H₂O

• H₂Se

• H₂Te

Boiling point increases with stronger intermolecular forces

Which intermolecular force explains why iodine (I₂) is a solid at room temperature while chlorine (Cl₂) is a gas?

• Dipole–dipole interactions

• Hydrogen bonding

• Ion–dipole interaction

• London dispersion forces