CHEM 121 Study Guide - Midterm Guide: Boiling Point, London Dispersion Force, Bromine

Draw the best Lewis structure for CH₂F₂. Which of the following is/are true?

A. CH₂F₂ is nonpolar

B. There are dispersion forces between two CH₂F₂ molecules

C. There are dipole-dipole forces between two CH₂F₂ molecules

D. There is hydrogen bonding between two CH₂F₂ molecules

E. The strongest intermolecular force between two CH₂F₂ molecules is ion-dipole forces

F. CH₂F₂ should have a lower boiling point than CH₄

G. The molecular geometry for CH₂F₂ is tetrahedral

Which of the following is/are true?

A. SF₄ is a polar molecule and has a seesaw molecular geometry

B. The strongest intermolecular force in KBr(aq) is ion-dipole forces

C. BF₃ is a nonpolar molecule and has a trigonal planar molecular geometry

D. CH₃CHO is polar; there are dipole-dipole forces and dispersion forces between two CH₃CHO molecules, but no hydrogen bonding

1. Solids tend to have intermolecular forces.

True or False

2. Intermolecular forces are important for molecules with what kind of bonding?

a. Ionic

b. Covalent

c. Metallic

3. Molecules that are non-polar have only _____________ IM forces.

a. Hydrogen Bonding

b. Dipole-Dipole

c. Londo Dispersion

4. What elements does a molecule need to contain in order to form hydrogen bonds?

5. List an example of a compound that forms in a covalent network