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27. Which of the following ions is NOT isoelec-
tronic to a noble gas?
(A) Al
+3
(B) K+
(C) Br 
–
(D) Co
+2
(E) Ba
+2
28. What volume of .3M H
2
SO
4
is needed to com-
pletely neutralize 200ml of .75M KOH?
(A) 200ml
(B) 225ml
(C) 250ml
(D) 300ml
(E) 500ml
29. All of the following are true of Co EXCEPT
(A) Co has two primary oxidation states +2
and +3
(B) Co
+3
is a weak oxidant
(C) Co can form compounds with sulfur
(D) Co can form compounds with arsenic
(E) Co metal has a bluish-white color

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Chemistry Subject Test
291
ARCO
■ SAT II Subject Tests
w w w . p e t e r s o n s . c o m / a r c o
30. The electron configuration of Cr is (atomic
number = 24)
(A) 1s
2
2s
2
2p
6
3s
2
3p
6
4s
2
4p
4
(B) 1s
2
2s
2
2p
6
3s
2
3p
6
3d
6
(C) 1s
2
2s
2
2p
6
3s
2
3p
6
3d
4
4s
2
(D) 1s
2
2s
2
2p
6
3s
2
3p
6
4s
1
4p
5
(E) 1s
2
2s
2
2p
6
3s
2
3p
6
3d
5
4s
1
31. All of the following are safe laboratory prac-
tices EXCEPT
(A) never place a container of liquid on a
piece of electrical equipment
(B) turn off a bunsen burner when it is not
being used
(C) to dilute an acid, slowly pour water into it
(D) know where the first aid equipment is stored
(E) use toxic chemicals and solvents in a
fume hood
32. A solution has a pH = 10; what is the [OH
–
]?
(A) 1 
× 10–
4 
M
(B) 1 
× 10–
10
M
(C) 1 
× 10
–2 
M
(D) 1 
× 10
–6
M
(E) 1 
× 10
–8 
M
33. The oxidation state(s) shared by each of the
elements in group IV (C, Si, Ge, Sn, and Pb)
is (are)
(A) +2
(B) +4
(C) +2, +4
(D) –2, +2
(E) – 4 , +4
34. Which of the following compounds is isoelec-
tronic with CO?
(A) H
2
(B) Cl
2
(C) N
2
(D) CO
2
(E) NO
2
35. What is the approximate molarity of water
(H
2
O)?
(A) 18M
(B) 25M
(C) 55M
(D) 75M
(E) 100M
36.
This equation is an
example of which type of reaction?
(A) Alpha decay
(B) Beta decay
(C) Gamma decay
(D) Fusion
(E) Chemiluminescence
37. Which of the following molecules has the
smallest dissociation energy?
(A) Li
2
(B) Na
2
(C) K
2
(D) Rb
2
(E) Cs
2
38. All of the following molecules exist EXCEPT
(A) PCl
3
(B) PCl
5
(C) NF
3
(D) NF
5
(E) P
2
I
4
39. C
2
H
5
OH + 3O
2
= 2CO
2
+ 3H
2
O
According to the reaction above, if 5 moles of
CO
2
are produced, then which of the follow-
ing is true? (MW of C
2
H
5
OH = 46)
(A) 115g of C
2
H
5
OH are consumed.
(B) 58g of C
2
H
5
OH are consumed.
(C) 192g of O
2
are consumed.
(D) 96g of O
2
are consumed.
(E) 108g of H
2
O are produced.
14
C
6
14
C N
+
+ e
–
7
→
GO ON TO THE NEXT PAGE

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Lesson 10
292
w w w . p e t e r s o n s . c o m / a r c o
ARCO
■ SAT II Subject Tests
40. 5H
2
C
2
O
4
+ 2KMnO
4
+ HCl = 10CO
2
+ 2MnCl
2
+ H
2
O + 2KCl
In the equation above, which species is the oxidant?
(A) C
+3
(B) C
+4
(C) Mn
+7
(D) Mn
+2
(E) Cl
–
41. What is the percent composition of CO
2
?
(Atomic weights: C = 12; O = 16)
(A) 10% C and 90% O
(B) 14% C and 86% O
(C) 18% C and 82% O
(D) 23% C and 77% O
(E) 27% C and 73% O
42. All of the following carbon isotopes are
radioactive EXCEPT
10
(A)  C
6
13
(B)  C
6
14
(C)  C
6
15
(D)  C
6
16
(E)  C
6
43. 8H
+
+ 3CuS + 8NO
–3
= 3SO
4
–2 
+ 3Cu
+2 
+ 8NO
+ 4H
2
O
(Atomic weights: CuS = 96; NO = 30)
If 200g of CuS are consumed, then approxi-
mately how many grams of NO are produced?
(A) 500g
(B) 400g
(C) 250g
(D) 200g
(E) 160g
44. Element
Electronegativity
H
2.1
Cl
2.8
Mg
1.2
N
3.1
F
4.1
Given the electronegativities above, which of
the following compounds has the bonds with
the greatest polarity?
(A) HF
(B) NH
3
(C) HCl
(D) MgCl
2
(E) F
2
45. Approximately how many moles of potassium
permanganate, KMnO
4
, are present in 40g of
this compound? (Atomic weights: K = 39; Mn
= 55; O = 16)
(A) 1 mole
(B) 0.5 mole
(C) 0.25 mole
(D) 0.1 mole
(E) 0.05 mole
46. Of the following compounds, which has the
highest boiling point?
(A) CH
3
—CH
3
(B) CH
3
—CH
2
OH
(C) CH
3
—COOH
(D) CH
3
—COH
(E) H
2
S
47. If 500ml of a .2M NaCl solution is mixed with
200ml of a 1.6M NaCl solution and then
diluted to one liter with water, what is the
molarity of the resulting solution?
(A) 0.2M
(B) 0.33M
(C) 0.42M
(D) 0.54M
(E) 0.6M

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Chemistry Subject Test
293
ARCO
■ SAT II Subject Tests
w w w . p e t e r s o n s . c o m / a r c o
48. Assign oxidation numbers to each atom in
NH
4
NO
2
.
(A) N=4, –4; H=1; O=–2
(B) N=–3; H=1; O=3
(C) N=–1; H=1; O=–2
(D) N=3, –3; H=1; O=–2
(E) N=0; H=1; O=–2
49. A flame test of a particular element gives a
persistent yellow color. This element is most
likely which of the following?
(A) Pb
(B) Na
(C) Cu
(D) Sr
(E) K
50. Which of the following acids is the weakest?
(A) HF K
A
= 6.8 
× 10
–4
(B) H
3
PO
4
K
A
= 7.5 
× 10
–3
(C) HNO
2
K
A
= 4.5 
× 10
–4
(D) CH
3
COOH K
A
= 1.8 
× 10
–5
(E) H
2
S K
A
= 1.1 
× 10
–7
51. Which of the following is a monounsaturated
hydrocarbon, i.e. the compound that contains
one carbon–carbon double bond?
(A) C
3
H
6
(B) C
2
H
2
(C) C
6
H
6
(D) C
5
H
8
(E) C
2
H
6
52. Enough Na
2
SO
4
is dissolved in water at 40
°C
to saturate the solution. When this occurs heat
is given off. All of the following statements
are true EXCEPT
(A) the enthalpy change of this process is
negative
(B) the boiling point of the solution is higher
than that of pure water
(C) the freezing point of the solution is lower
than that of pure water
(D) if the temperature of the water is lowered,
then the solubility of Na
2
SO
4
decreases
(E) if the temperature of the water is raised,
then the solubility of Na
2
SO
4
decreases
53. The equation for the solubility product con-
stant of Ag
2
CrO
4
is
(A) K
sp
= [Ag
+2
] · [CrO
4
–2
]
(B) K
sp
= [Ag
+
]
2
· [Cr
+6
] · [O
4
–8
]
(C) K
sp
= [Ag
+
] · [Cr
+6
] · [O
4
–8
]
(D) K
sp
= [Ag
+
]
2
· [CrO
4
–2
]
(E) K
sp
= [Ag
+
]
2
· [CrO
4
–2
]
2
54. What is the molarity of a 30%(vol/vol) solu-
tion of H
2
SO
4
? (Molecular weight of H
2
SO
4
=
98; density of H
2
SO
4
= 1.8 g/ml)
(A) 1.5M
(B) 2.0M
(C) 3.0M
(D) 4.5M
(E) 5.5M
55. Given: Mn
+2
+ 2e
–
= Mn
ε° = –1.20V
Zn
+2
+ 2e
–
= Zn
ε° = –0.80V
What is the expression for the equilibrium con-
stant of the spontaneous oxidation-reduction
reaction?
(A) K
eq
= .4
(B) K
eq
= .8
(C) K
eq
= 10
.4/.059
(D) K
eq
= 10
.8/.059
(E) K
eq
= 10
–.4/.059
56. The number of moles of ethane that occupies
11 liters at 27
°C with a pressure of 3 atmo-
spheres is (R = 0.082 liter–atm/mole K)
(A) 3 
× 27/0.082 × 11 moles
(B) 0.082 
× 11/3 × 300 moles
(C) 3 
× 11/0.082 × 300 moles
(D) 3 
× 0.082/300 × 11 moles
(E) 3 
× 11/0.082 × 27 moles
57. In qualitative analysis, Hg
+2
can be separated
from Cu
+2
by the addition of 3M HNO
3
because
(A) Cu(NO
3
)
2
is less soluble than Hg(NO
3
)
2
(B) Hg(NO
3
)
2
is less soluble than Cu(NO
3
)
2
(C) HgS is less soluble than CuS in 3M HNO
3
(D) CuS is less soluble than HgS in 3M HNO
3
(E) Hg
+2
is oxidized by 3M HNO
3
, whereas
Cu
+2
is not
GO ON TO THE NEXT PAGE

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Lesson 10
294
w w w . p e t e r s o n s . c o m / a r c o
ARCO
■ SAT II Subject Tests
58. Assume that all the compounds in this prob-
lem have identical freezing-point depression
constants (K
f
). Which of the following would
depress the freezing point the most when
added to 1 liter of water?
(A) One mole of NaCl
(B) One-half mole of NH
4
NO
2
(C) One-half mole of MgBr
2
(D) One mole of NH
4
NO
2
(E) One mole of CaCl
2
59. __Fe(OH)
3
+ __(OH
–
) + __ClO
–
= __FeO
4
–2
+
__Cl
–
+ __H
2
O
When the equation above is balanced, how
many grams of H
2
O are produced when 1 mole
of Fe(OH)
3
is consumed?
(A) 18g
(B) 27g
(C) 36g
(D) 45g
(E) 54g
60. HPO
4
–2
+ H
2
O = H
3
O
+
+ PO
4
–3
In the equation above, which compounds are
Brönsted bases?