1) Which of the following ions will act as a weak base in water?
A) HS–
B) F–
C) NO2
–
D) ClO–
E) All of the above will act as a weak base in water.
2) Which combination will produce a precipitate?
A) NH4OH (aq) and HCl (aq)
B) AgNO3 (aq) and Ca(C2H3O2)2 (aq)
C) NaOH (aq) and HCl (aq)
D) NaCl (aq) and HC2H3O2 (aq)
E) NaOH (aq) and Fe(NO3)2 (aq)
3) Of the compounds below, the one that requires the shortest wavelength for
photoionization is ________.
A) O
B) O2
C) NO
D) N2
E) They all require the same wavelength.
4) Colligative properties of solutions include all of the following except ________.
A) depression of vapor pressure upon addition of a solute to a solvent
B) elevation of the boiling point of a solution upon addition of a solute to a solvent
C) depression of the freezing point of a solution upon addition of a solute to a solvent
D) an increase in the osmotic pressure of a solution upon the addition of more solute
E) the increase of reaction rates with increase in temperature
5) If we start with 1.000 g of strontium-90, 0.805 g will remain after 9.00 yr. This
means that the half-life of strontium-90 is ________ yr.
A) 7.74
B) 11.2
C) 28.8
D) 7.25
E) 41.6
6) Which of the following is not an allotropic form of carbon?
A) graphite
B) diamond
C) carbide
D) buckminsterfullerene
E) All of the above are allotropic forms of carbon.
7) The density of silver is 10.5 g/cm3. A piece of silver with a mass of 61.3 g would
occupy a volume of ________ cm3.
A) 0.171
B) 644
C) 10.5
D) 0.00155
E) 5.84
8) Which solution below has the highest concentration of hydronium ions?
A) pH = 3.0
B) pH = 10
C) pH = 7.0
D) pH = 6.4
E) pH = 11.2
9) Bombardment of uranium-235 with a neutron generates tellurium-135, 3 neutrons,
and ________.
A) zirconium-98.
B) krypton-101.
C) krypton-103.
D) strontium-99.
E) zirconium-99.
10) ________ is the abbreviation for the prefix milli-.
A) k
B) m
C) M
D) n
E) d
11) Of the following, ________ is the least volatile.
A) CI4
B) CF4
C) CBr4
D) CCl4
E) CH4
12) The molecular geometry of the PF4
+ ion is ________.
A) octahedral
B) tetrahedral
C) trigonal pyramidal
D) trigonal planar
E) trigonal bipyramidal
13) Which pair of formula/name is incorrect?
A) NO2 / dinitrogen oxide
B) N2O / nitrous oxide
C) NO / nitric oxide
D) N2O4 / dinitrogen tetroxide
E) N2O5 / dinitrogen pentoxide
14) Under constant conditions, the half-life of a first-order reaction ________.
A) is the time necessary for the reactant concentration to drop to half its original value
B) is constant
C) can be calculated from the reaction rate constant
D) does not depend on the initial reactant concentration
E) All of the above are correct.
15) The second shell in the ground state of atomic argon contains ________ electrons.
A) 2
B) 6
C) 8
D) 18
E) 36
16) S is positive for the reaction ________.
A) 2H2 (g) + O2 (g) –> 2H2O (g)
B) 2NO2 (g) –> N2O4 (g)
C) CO2 (g) –> CO2 (s)
D) BaF2 (s) –> Ba2+ (aq) + 2F– (aq)
E) 2Hg (l) + O2 (g) –> 2HgO (s)
17) Which compound has the atom with the highest oxidation number?
A) CaS
B) Na3N
C) MgSO3
D) Al(NO2)3
E) NH4Cl
18) Which of these nuclides is most likely to be radioactive?
A) K
B) Al
C) I
D) Am
E) Bi
19) The energy (J) required for an electronic transition in a Bohr hydrogen atom from n
= 2 to n = 3 is ________ J.
A) 4.00 X 10-19
B) 3.00 X 10-19
C) -3.00 X 10-19
D) -7.90 X 10-19
E) 4.60 X 1014
20) Calcium carbide (CaC2) reacts with water to produce acetylene (C2H2):
CaC2 (s) + 2H2O (g) → Ca(OH)2 (s) + C2H2 (g)
Production of 6.5 g of C2H2 requires consumption of ________ g of H2O.
A) 2.3
B) 4.5
C) 9.0
D) 480
E) 0.048