Unit 3 - AP Chemistry Review

What is the strongest type of intermolecular force this molecule will experience?

• London dispersion forces (LDF)

• Hydrogen bonding

• Dipole-dipole interactions

Answer explanation

The C-H bond is nonpolar; therefore, this molecule will not experience dipole-dipole interactions. (Hydrogen bonding is not an option for this reason and because it does not contain oxygen, nitrogen, or fluorine).

Tags

NGSS.HS-PS2-6

Which molecule will experience the strongest London dispersion forces?

Answer explanation

The larger the molecule, the more LDF it will experience due to the polarizability of its electron cloud.

Which of the following substances will experience a repeating network of covalent bonds?

• Glass

• Copper

• Brass Alloy

• Silicon dioxide

Answer explanation

Know that certain covalent substances (SiO2, graphite, and diamond) create a network of repeating units. They act as a single unit rather than individual molecules.

Tags

NGSS.HS-PS2-6

Which household ingredient would you expect to experience the greatest intermolecular forces?

• Olive oil

• Salad dressing

• Honey

• Chocolate syrup

Answer explanation

The higher the viscosity of a liquid, the greater its IMF.

Which of the following statements is NOT true about an ideal gas?

• It experiences completely inelastic collisions

• The movement of its particles is completely random.

• It has essentially no volume.

• It experiences no attractive or repulsive forces between molecules.

Answer explanation

An ideal gas will experience completely elastic collisions where energy is neither lost nor gained.

Which of the following substances contains both ionic and

covalent bonds?

• NH₃

• CH₄

• NaOH

• C₂H₅OH

What type of bonding is found within a water molecule?

• ionic bonding

• polar covalent bonding

• nonpolar covalent bonding

• hydrogen bonding

Dinitrogen monoxide, N₂0, has two double bonds. The general structure is N=N=O. What is the formal charge on the oxygen atom in this molecule?

• zero

• positive one (+1)

• positive two (+2)

• negative one (-1)

The Lewis structure of which compound is best represented with resonance structures?

• MgCl₂

• CO₂

• SO₃ ^2-

• OCl₂

Which of the following compounds would have the highest lattice energy?

• LiF

• MgCl₂

• CaBr₂

• C₂H₆

Tags

NGSS.HS-PS1-3

NGSS.HS-PS2-4