1) Which of the following traits characterizes the alkali metals?
A) very high melting point
B) existence as diatomic molecules
C) formation of dianions
D) the lowest first ionization energies in a period
E) the smallest atomic radius in a period
2) Consider the reaction:
NH3 (g) + HCl (g) –> NH4Cl (s)
Given the following table of thermodynamic data,
determine the temperature (in oC) above which the reaction is nonspontaneous.
A) This reaction is spontaneous at all temperatures.
B) 618.1
C) 432.8
D) 345.0
E) 1235
3) The value of Keq for the following reaction is 0.26:
A (g) + B (g) C (g) + D (g)
The value of Keq at the same temperature for the reaction below is ________.
2A (g) + 2B (g) 2C (g) + 2D (g)
A) 0.068
B) 0.52
C) 1.2
D) 0.065
E) 0.26
4) Atoms with the same atomic number and different mass numbers ________.
A) do not e x ist
B) are isomers
C) are isotopes
D) are allotropes
E) are resonance structures
5) Which of the following compounds would you expect to be ionic?
A) H2O
B) CO2
C) SrCl2
D) SO2
E) H2S
6) Sulfur released into the troposphere arises from both natural and human activity.
What is the ratio of human to natural sources of sulfur compounds?
A) 3:1
B) 2:1
C) 1:1
D) 1:2
E) 1:3
7) The hybridization of the oxygen atom labeled y in the structure below is ________.
The C-O-H bond angle is ________.
A) sp, 180°
B) sp2, 109.5°
C) sp3, 109.5°
D) sp3d2, 90°
E) sp, 90°
8) For which salt should the aqueous solubility be most sensitive to pH?
A) Ca(NO3)2
B) CaF2
C) CaCl2
D) CaBr2
E) CaI2
9) Given the following reactions
Fe2O3 (s) + 3CO (s) → 2Fe (s) + 3CO2 (g) ΔH = -28.0 kJ
3Fe (s) + 4CO2 (s) → 4CO (g) + Fe3O4 (s) ΔH = +12.5 kJ
the enthalpy of the reaction of Fe2O3 with CO
3Fe2O3 (s) + CO (g) → CO2 (g) + 2 Fe3O4 (s)
is ________ kJ.
A) -59.0
B) 40.5
C) -15.5
D) -109
E) +109
10) When the electron in a hydrogen atom moves from n = 6 to n = 1, light with a
wavelength of ________ nm is emitted.
A) 487
B) 411
C) 434
D) 93.8
E) 657
11) The net ionic equation for formation of an aqueous solution of Al(NO3)3 via mixing
solid Al(OH)3 and aqueous nitric acid is ________.
A) Al(OH)3 (s) + 3HNO3 (aq) → 3H2O (l) + Al(NO3)3 (aq)
B) Al(OH)3 (s) + 3NO3
– (aq) → 3OH– (aq) + Al(NO3)3 (aq)
C) Al(OH)3 (s) + 3NO3
– (aq) → 3OH– (aq) + Al(NO3)3 (s)
D) Al(OH)3 (s) + 3H+ (aq) → 3H2O (l) + Al3+ (aq)
E) Al(OH)3 (s) + 3HNO3 (aq) → 3H2O (l) + Al3+ (aq) + NO3
– (aq)
12) Of the following, which one is a state function?
A) H
B) q
C) w
D) heat
E) none of the above
13) The charge on the silver ion in the salt AgCl is ________.
A) +2
B) +1
C) +3
D) +4
E) +5
14) The dividing line between the troposphere and stratosphere is known as the
________.
A) mesosphere
B) tropopause
C) thermosphere
D) stratopause
E) mesopause