What are the forces of attraction holding helium atoms together called?

• Hydrogen bonds

• London Dispersion Forces

• Ionic interactions

• Covalent bonds

Which type of bonding is never found in elements?

• Metallic

• London Dispersion Forces

• Polar covalent

• Non-polar covalent

Between which of the following molecules can hydrogen bonding take place?

• Ammonia

• Hydrogen chloride

• Carbon monoxide

• Methane

Which of the following is not an example of a Van der Waals force?

• Covalent bond

• Hydrogen bond

• Permanent dipole-permanent dipole

• London dispersion force

Which of the following has more than one type of Van der Waals' force operating between it's molecules in the liquid state?

• Br₂

• CO₂

• NH₃

• CH₄

An element contains Covalent bonding and London Dispersion Forces. This element could be

• boron

• neon

• sodium

• sulfur

Which line in the table is correct for the polar covalent bond in hydrogen chloride?

• A

• B

• C

• D

Why is the boiling point of CCl₄ lower than that of SiCl₄?

• SiCl₄ molecules are more polar than CCl₄ molecules

• SiCl₄ can hydrogen bond but CCl₄ cannot

• SiCl₄ is ionic but CCl₄ is covalent

• The LDFs between SiCl₄ molecules are stronger than the LDFs between CCl₄ molecules

Which of the following molecules has the largest dipole?

• H₂

• H-Cl

• H-F

• F-Cl

Intermolecular forces are the forces

• within molecules

• between molecules