Unit 5 Review

What type of intermolecular force would you expect to be most prevalent between two ammonia (NH₃) molecules?

• Hydrogen Bond

• Polarity Force

• Dispersion Forces

• None Exist

What type of intermolecular force primarily exists between two CH₄ molecules?

• Dipole-Dipole Force

• Hydrogen Bonds

• Dispersion Forces

• None Exist

What type of intermolecular force primarily exists between two oxygen molecules (O₂ and O₂)?

• Dipole- Dipole

• Deduced Dipole Forces

• Dispersion Forces

• None Exist

What type of intermolecular force exists between two polar molecules?

• Dipole -Dipole

• Deduced Dipole

• Dispersion

• None Exist

What type of intermolecular force exists between two non-polar molecules?

• Dipole - Dipole

• Hydrogen Bond

• Dispersion

• None Exist

A certain substance has a very low boiling point. The substance is most likely

• ionic

• polar covalent

• non-polar covalent

• metallic

Which of the following molecules is polar?

• F₂

• H₂O

• O₂

• All of these

A bond is polar only when

• both atoms have equal electronegativities

• both atoms have different electronegativities

• one atom is larger than the other

• the atoms do not bond

Consider two atoms that are covalently bonded. The greater the difference in electronegativity between the atoms....

• the more polar the bond

• the less polar the bond

• the more covalent the bond

• none of these

For most solids, melting is characterized by

• molecules losing energy of molecular motion

• increased pressure on a solid

• an increase in energy of molecular motion

• decreased mass