CHEMISTRY 110 SPRING 2014 EXAM 1
Page 1
Part 1. Multiple Choice. (3 pts each). Choose the one best answer in each and record your answer on the accuscan form
provided. Make certain that you bubble-in your NUID number correctly on the form.
1) Which of the following statements is TRUE?
(a) At room temperature, particles with strong intermolecular forces between them tend to form liquids or solids
while those with weak intermolecular forces tend to result in gases.
(b) Energy is given off when the attraction between two molecules is broken.
(c) Vapor pressure increases with increasing intermolecular forces.
(d) Intermolecular forces are generally stronger than bonding forces.
(e) Dispersion forces require a molecule with a permanent dipole moment.
2) What is the strongest type of intermolecular force present in methylamine, NH2CH3, made famous in the series
Breaking Bad?
(a) hydrogen bonding
(b) dispersion
(c) ion-dipole
(d) dipole-dipole
(e) none of the above
3) All of the following hydrocarbon compounds are straight-chain compounds. Based on intermolecular forces alone,
which probably has the lowest boiling point at 1.0 atm pressure?
(a) C2H6
(b) C6H14
(c) C4H10
(d) C5H12
(e) C3H8
4) A liquid will “wet” a surface if:
(a) the liquid has a lesser density than the surface
(b) the forces between the liquid molecules are weak
(c) the forces between the molecules and the surface are greater than the forces between the molecules of the
liquid
(d) The liquid has low viscosity and the surface is smooth
(e) the liquid has a low vapor pressure
methylamine
CHEMISTRY 110 SPRING 2014 EXAM 1
5) Which of the following compounds is the most viscous?
CH3CH2–OH, CH3CH2CH2CH3, HO–CH2CH2–OH, CH3–O–CH2CH3
(a) CH3–O–CH2CH3
(b) CH3CH2–OH
(c) CH3CH2CH2CH3
(d) HO–CH2CH2–OH
(e) Not enough information to tell
6) A liquid is in equilibrium with its vapor. If some of the vapor is allowed to escape, what is the immediate result?
Page 4
Page 5
Page 6
