Quiz 1

How many of the following molecules are polar? BrCl3 CS2 SiF4 SO3 A) 4 B) 1 C) 3 D) 2 E) 0

Choose the compound below that contains at least one polar covalent bond, but is nonpolar. A) ICl3 B) CF4 C) SeBr4 D) HCN E) Both B and C are nonpolar and contain a polar covalent bond.

What is the strongest type of intermolecular force present in CHF3? A) ion-dipole B) dispersion C) dipole-dipole D) hydrogen bonding E) none of the above

Place the following compounds in order of increasing strength of intermolecular forces: CH4 CH3CH2CH3 CH3CH3 A) CH4 < CH3CH3 < CH3CH2CH3 B) CH3CH2CH3 < CH3CH3 < CH4 C) CH3CH2CH3 < CH4 < CH3CH3 D) CH3CH3 < CH4 < CH3CH2CH3 E) CH4 < CH3CH2CH3 < CH3CH3

Place the following compounds in order of decreasing strength of intermolecular forces: HF O2 CO2 A) O2 > CO2 > HF B) CO2 > O2 > HF C) HF > CO2 > O2 D) HF > O2 > CO2 E) CO2 > HF > O2

Which of the following statements is TRUE? A) Vapor pressure increases with temperature. B) Dispersion forces are generally stronger than dipole-dipole forces. C) Hydrogen bonds are stronger than covalent bonds. D) Intermolecular forces hold the atoms in molecules together. E) None of the above are true

Choose the substance with the lowest vapor pressure at a given temperature. A) BeCl2 B) He C) PF5 D) BF3 E) CO2

How much energy is required to vaporize 158 g of butane (C4H10) at its boiling point, if its ̇Hvap is 24.3 kJ/mol? A) 89.4 kJ B) 66.1 kJ C) 11.2 kJ D) 15.1 kJ E) 38.4 kJ

Place the following substances in order of decreasing boiling point: H2O N2 CO A) CO > N2 > H2O B) H2O > CO > N2 C) CO > H2O > N2 D) N2 > H2O > CO E) N2 > CO > H2O

Define deposition: A) A solid becomes a liquid. B) A solid becomes a gas. C) A gas becomes a solid. D) A gas becomes a liquid. E) A liquid becomes a gas.