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1) The lowest energy shell that contains f orbitals is the shell with n = ________.
A) 3
B) 2
C) 4
D) 1
E) 5
2) The concentration of iodide ions in a 0.193 M solution of barium iodide is ________.
A) 0.193 M
B) 0.386 M
C) 0.0965 M
D) 0.579 M
E) 0.0643 M
3) What is the de Broglie wavelength (m) of a 15-g object moving at a speed of 3.0
m/s?
A) 1.9 X 1032 m
B) 5.3 X 10-33 m
C) 1.9 X 10-36 m
D) 1.5 X 10-32 m
E) 3.0 X 1045 m
4) Consider the following reaction at equilibrium:
2NH3 (g) N2 (g) + 3H2 (g)Ho = +92.4 kJ
Le Ch¢telier's principle predicts that removing N2 (g) to the system at equilibrium will
result in ________.
A) an increase in the concentration of H2
B) a decrease in the concentration of H2
C) removal of all of the H2
D) a lower partial pressure of H2
E) an increase in the value of the equilibrium constant
5) Which one of the following will cause hemoglobin to release oxygen?
A) increase in pH
B) decrease in pH
C) decrease in temperature
D) decrease in CO2 concentration
E) increase in O2 concentration
6) The ease with which the charge distribution in a molecule can be distorted by an
external electrical field is called the ________.
A) electronegativity
B) hydrogen bonding
C) polarizability
D) volatility
E) viscosity
7) Diborane is ________.
A) B10H14
B) B2O3
C) BH3
D) B2H6
E) H3BO3
8) Which one of the following is not true about the alkali metals?
A) They are low density solids at room temperature.
B) They all readily form ions with a +1 charge.
C) They all have 2 electrons in their valence shells.
D) They are very reactive elements.
E) They have the lowest first ionization energies of the elements.
9) The half-life of a first-order reaction is 13 min. If the initial concentration of reactant
is 0.085 M, it takes ________ min for it to decrease to 0.055 M.
A) 8.2
B) 11
C) 3.6
D) 0.048
E) 8.4
10) The only noble gas that does not have the ns2np6 valence electron configuration is
________.
A) radon
B) neon
C) helium
D) krypton
E) All noble gases have the ns2np6 valence electron configuration.
11) Oxidation and ________ mean essentially the same thing.
A) activity
B) reduction
C) metathesis
D) decomposition
E) corrosion
12) Which of the following expressions is the correct equilibrium-constant expression
for the reaction below?
(NH4)2Se (s) 2NH3 (g) + H2Se (g)
A) [NH3][H2Se] / [(NH4)2Se]
B) [(NH4)2Se] / [NH3]2[H2Se]
C) 1 / [(NH4)2Se]
D) [NH3]2[H2Se]
E) [NH3]2[H2Se] / [(NH4)2Se]
13) How many structural isomers of heptane exist?
A) 2
B) 4
C) 6
D) 8
E) 9
