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Chemistry 108
Practice Final
1. The boiling point of HCl(l) is higher than the boiling point of Ar(l) as a result of
(a) hydrogen b onding
(b) higher formula mass
(c) stronge r London forces
(d) perman ent dipole forces
(e) ion-ion forces
2. Which of the following truly describes the atmosphere?
(a) Temperature increases in regular way with increasing altitude.
(b) Pressure increases in a regular way with increasing altitude.
(c) Concentra tions of all major air pollutants increase in a regular way with
increasing altitude.
(d) Temperatur e decreases in a regular way with increasing altitude
(e) Pressure decreases in a regular way with increasing altitude.
3. Which of the following molecules will have the largest dipole moment?
(a) CS2
(b) SF6
(c) XeF2
(d) BF3
(e) OF2
4. Which of the following substances has the strongest interm olecular attractions?
(a) He, boiling point !268.6°C
(b) Ne, boiling point !245.9°C
(c) Ar, boiling point !185.7°C
(d) Kr, b oiling point !152.3°C
(e) All have equally strong intermolecular attractions.
5. The molecular shape of AsF5 is expected to be
(a) trigonal bipyramidal
(b) T-shaped
(c) octahedral
(d) tetrahed ral
(e) square planar
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6. What is the predominant intermolecular force in carbon tetrachloride, C Cl4?
(a) London dispersion force
(b) ion-dipole attraction
(c) ionic bonding
(d) dipole-dipole attraction
(e) hydrogen- bonding
7. Given the following samples of gases
N2 N2 O2 N2
1.0 atm 0.5 atm 1.0 atm 0.5 atm
0°C 0°C 0°C 20°C
I II II I IV
Which of the following statements are false?
1. I and II have the same averag e kinetic energy.
2. II and IV have the same ave rage kinetic energy.
3. I has a higher average speed than III.
4. I has a higher average speed than II.
(a) 1 and 2 are false
(b) 1 and 3 are false
(c) 1 and 4 are false
(d) 2 and 3 are false
(e) 2 and 4 are false
8. Place the following in order of increasing first ionization energy
F, O, Ne, Cs, Rb, Fe.
(a) F < O < Ne < Cs < Rb < Fe
(b) Fe < Ne < O < F < Cs < Rb
(c) Cs < Rb < Fe < O < F < Ne
(d) Ne < Fe < Cs < Rb < O < F
(e) Cs < Rb < O < Fe < F < Ne
