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1) Which atom has the largest number of neutrons?
A) silicon-30
B) sulfur-36
C) argon-38
D) calcium-44
E) magnesium-24
2) Which of the following are combustion reactions?
1. CH4 (g) + O2 (g) → CO2 (g) + H2O (l)
2. CaO (s) + CO2 (g) → CaCO3 (s)
3. PbCO3 (s) → PbO (s) + CO2 (g)
4. CH3OH (l) + O2 (g) → CO2 (g) + H2O (l)
A) 1 and 4
B) 1, 2, 3, and 4
C) 1, 3, and 4
D) 2, 3, and 4
E) 3 and 4
3) Consider the following xenon compounds:
(i) XeF2(ii) XeF4
(iii) XeO4
(iv) XeOF4
(v) XeO3
Which of the compounds is(are) polar?
A) (i) only
B) (ii) and (iii)
C) (iv) only
D) (iii) and (iv)
E) (iv) and (v)
4) There are ______ covalent bonds in the Lewis Structure of CH3CHCl2.
A) 7
B) 6
C) 8
D) 5
E) 4
5) Which halogen can react with fluorine to form the compound XF7?
A) bromine
B) fluorine
C) chlorine
D) iodine
E) astatine
6) Of the following, only ________ is a chemical reaction.
A) melting of lead
B) dissolving sugar in water
C) tarnishing of silver
D) crushing of stone
E) dropping a penny into a glass of water
7) The scale caused by hard water is ________.
A) calcium ions
B) calcium carbonate
C) chloride ions
D) magnesium oxalate
E) magnesium ions
8) Metals with ________ electron configurations characteristically form diamagnetic,
square planar complexes.
A) d0
B) d9
C) d6
D) d8
E) d10
9) Which one of the following complex ions will be paramagnetic?
A) [Fe(H2O)6]2+ (low spin)
B) [Fe(H2O)6]3+ (low spin)
C) [Co(H2O)6]3+ (low spin)
D) [Zn(H2O)4]2+
E) [Zn(NH3)4]2+
10) Of the following solutions, which has the greatest buffering capacity?
A) 1.15 M HF and 0.624 M NaF
B) 0.574 M HF and 0.312 M NaF
C) 0.287 M HF and 0.156 M NaF
D) 0.189 M HF and 0.103 M NaF
E) They are all buffer solutions and would all have the same capacity.
11) What is the empirical formula of a compound that contains 27.0% S, 13.4% O, and
59.6% Cl by mass?
A) SOCl
B) SOCl2
C) S2OCl
D) SO2Cl
E) ClSO4
12) A triple bond consists of ________ pairs of electrons shared between two atoms.
A) 1
B) 2
C) 3
D) 4
E) 6
13) Which one of the following gases would have the highest average molecular speed
at 25 °C?
A) O2
B) N2
C) CO2
D) CH4
E) SF6
14) The units of heat capacity are ________.
A) K/J or °C/J
B) J/K or J/°C
C) J/g-K or J/g-°C
D) J/mol
E) g-K/J or g-°C/J
15) The mass of a proton is 1.673 x 10-24 g. The mass of a neutron is 1.675 x 10-24 g.
The mass of the nucleus of an 59Fe atom is 9.787 x 10-23 g. What is the nuclear binding
energy (in J) for a 59Fe nucleus?
(c = 3.00 x 108 m/s)
A) 8.13 x 10-11
J
B) 2.71 x 10-19
J
C) 8.13 x 10-8
J
D) 4.00 x 10-9
J
E) -9.74 x 10-10
J
16) The rate constant for a particular zero-order reaction is 0.075 M s-1. If the initial
concentration of reactant is 0.537 M it takes ________ s for the concentration to
decrease to 0.100 M.
A) 5.8
B) -5.8
C) -0.047
D) 7.2
E) 0.040
17) The formula weight of Zn(ClO4)2 is ________ amu.
A) 164.7
B) 128.0
C) 79.0
D) 264.1
E) 116.7
18) Based on molecular mass and dipole moment of the five compounds in the table
below, which should have the highest boiling point?
A) CH3CH2CH3
B) CH3OCH3
C) CH3Cl
D) CH3CHO
E) CH3CN
19) The product of the addition reaction wherein H2 is added to 1-propene in the
presence of a nickel catalyst is named ________.
A) propane
B) propyne
C) propanol
D) 2-butene
E) propanoic acid
20) A burning splint will burn more vigorously in pure oxygen than in air because
________.
A) oxygen is a reactant in combustion and concentration of oxygen is higher in pure
oxygen than is in air
B) oxygen is a catalyst for combustion
C) oxygen is a product of combustion
D) nitrogen is a product of combustion and the system reaches equilibrium at a lower
temperature
E) nitrogen is a reactant in combustion and its low concentration in pure oxygen
catalyzes the combustion
