Example Items
Chemistry
Chemistry Example Items are a representative set of items
for the ACP. Teachers may use this set of items along with the test blueprint
as guides to prepare students for the ACP. On the last page, the correct
answer and content SE is listed. The specific part of an SE that an Example
Item measures is NOT necessarily the only part of the SE that is assessed
on the ACP. None of these Example Items will appear on the ACP.
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Second Semester
2016–2017
Code #: 3101
(Version 2: 5/23/17)
EXAMPLE ITEMS Chemistry, Sem 2
1
The equation shown represents a gas-producing reaction.
2 KNO3(s)  2 KNO2(s) + O2(g)
After 55.551 grams of solid KNO3 (molar mass = 101.102 g/mol) completely decomposes, what
volume of oxygen gas (O2) is produced at Standard Temperature and Pressure (STP)?
2
3
A
6.154 liters
B
8.000 liters
C
12.31 liters
D
22.40 liters
Which statement about nuclear fusion and fission is TRUE?
A
Fission requires a high density and high temperature environment, while fusion requires
high speed neutrons to initiate.
B
Fission requires little energy to split the atoms, while fusion takes extremely high energy
to bring two or more atoms together.
C
Fusion is the union of two or more lighter atoms into a larger one, while fission is the
splitting of a large atom into two or more smaller ones.
D
Fission is the union of two or more lighter atoms into a larger one, while fusion is the
splitting of a large atom into two or more smaller ones.
The data shown was collected by a student from June 18th through June 24th.
Sampling Date
pH
Hydrogen Ion
Concentration
[H+](µmol/L)
Electrical Conductivity
(Intensity of light)
June 18
5.0
10
Low intensity
June 19
5.0
10
Low intensity
June 20
3.7
200
High intensity
June 24
4.6
25
Medium intensity
What type of relationship is found between the pH, the hydrogen ion concentration ([H+]), and
the electrical conductivity?
A
As the pH increases, both [H+] and electrical conductivity increase.
B
As the pH increases, [H+] decreases and electrical conductivity increases.
C
As the pH decreases, both [H+] and electrical conductivity increase.
D
As the pH decreases, [H+] increases and electrical conductivity decreases.
Dallas ISD - Example Items
EXAMPLE ITEMS Chemistry, Sem 2
Use the solubility curves to answer the next question.
Solubility of Salt
Solubility (g of salt in 100 g H 2O)
100
90
80
70
60
50
40
30
20
10
0
0
10
20
30
40
50
60
70
80
90
100
Temperature (ºC)
4
Which substance makes an unsaturated solution at a temperature of 50 °C ?
A
70 g KNO3
B
70 g NaCl
C
70 g KClO3
D
70 g K2Cr2O7
Use the reaction to answer the next question.
238
92
U
5
234
90
Th  ?
What kind of particle must be emitted to balance the equation shown?
A
Neutron
B
Alpha
C
Positron
D
Beta
Dallas ISD - Example Items
EXAMPLE ITEMS Chemistry, Sem 2
Use the balanced chemical reaction to answer the next question.
N2 + 3 H 2
6
7
2 NH3
How many moles of ammonia, NH3, are produced by reacting 5 moles of nitrogen gas, N2, with
excess hydrogen gas, H2? Assume the nitrogen gas, N2, is the limiting reagent.
A
4 moles
B
5 moles
C
8 moles
D
10 moles
A student used calorimetry to determine the amount of heat energy stored in a piece of candy.
The table shows the data collected.
Mass of beaker and water
Mass of beaker empty
125 g
25 g
Mass of candy used
2.5 g
Initial temperature of water
25 °C
Final highest temperature reached by the water
62 °C
Specific heat of water
4.18 J/(g•°C)
Based on the data in the table, what is the amount of heat stored in the candy?
8
A
386 J
B
6,186 J
C
15,466 J
D
25,916 J
If 5.0 grams of steel was heated from 11 ºC to 21 ºC, how much heat was absorbed by the steel?
Specific heat of steel is 0.45 J/(g•°C).
A
12.5 J
B
22.5 J
C
25.5 J
D
47.5 J
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Page 4 of 7
EXAMPLE ITEMS Chemistry, Sem 2
9
The pressure in a gas cylinder is 2.00 atm at 300.0 K. If the temperature goes up to 600.0 K,
what is the new pressure? The number of moles and the volume are held constant. Calculate the
answer to one significance digit.
Record the answer and fill in the bubbles on
the grid provided. Be sure to use the
correct place value.
10
Solid A and solid B were dissolved in two separate graduated cylinders, each containing 270 mL of
water.
Solid A
Solid B
T = 25.1 ºC
T = 30.2 ºC
T = 25.1 ºC
T = 20.8 ºC
Before
After
Before
After
Which statement best describes the dissolving reactions of solid A and solid B?
A
The dissolving reactions of both A and B were endothermic.
B
The dissolving reactions of both A and B were exothermic.
C
The dissolving reaction of A was exothermic, and the dissolving reaction of B was
endothermic.
D
The dissolving reaction of A was endothermic, and the dissolving reaction of B was
exothermic.
Dallas ISD - Example Items
EXAMPLE ITEMS Chemistry, Sem 2
Use the table to answer the next question.
Properties of Radiation Rays
11
1.
Low penetrating, blocked by paper, positively charged particles
2.
Low penetrating, blocked by aluminum foil, moves slowly
3.
Low penetrating, blocked by lead, identical to helium nucleus
4.
Low penetrating, blocked by concrete, massive
5.
Low penetrating, no charge, identical to helium atom
Which properties describe alpha radiation rays?
A
1, 2, 3, and 4 only
B
1, 3, and 5 only
C
1 and 3 only
D
1 and 5 only
Use the diagram to answer the next question.
OH– H+
OH–
H+ OH–
H+ H+
OH– H+
H+ OH–
OH–
H+ H+
–
OH H+
H+ OH– H+
H+ OH–
OH–
H+
–
OH H+
OH–
OH– OH–
H+
H+
–
OH
H+
Distilled Water
Vinegar
Battery Acid
Lye
Solution X
H+
12
OH–
H+
Which solution is the strongest acid?
A
Distilled water
B
Lye
C
Battery acid
D
Solution X
Dallas ISD - Example Items
H+
EXAMPLE ITEMS Chemistry, Sem 2
13
14
Which substance is soluble in an aqueous solution?
A
Pb(CO3)2
B
Ag3PO4
C
Sn(CrO4)2
D
NH4Cl
Three cups of carbonated soda are lowered into cups of water at varying temperatures.
Cup of carbonated soda
Cup of carbonated soda
Cup of carbonated soda
Cup A
Cup B
Cup C
Cold water
Water at room temperature
Hot water
All other factors being equal, in which cup does the greatest release of dissolved gas occur and
why?
A
Cup A, due to decreased solubility of gases at lower temperatures.
B
Cup B, because room temperature is ideal for the release of all gases.
C
Cup C, due to decreased solubility of gases at higher temperatures.
D
All cups will release the gas at same rate because temperature is not a factor.
Dallas ISD - Example Items
EXAMPLE ITEMS Chemistry, Sem 2
15
Which reaction represents an acid-base neutralization reaction?
A
2 Mg (s) + O2 (g)  2 MgO (s)
B
Pb (NO2 )3 (aq) + 2 KI (aq)  PbI2 (s) + 2 KNO3 (aq)
C
4 Fe (s) + 3O2 (g)  2 Fe2O3 (s)
D
NaOH (aq) + HCl (aq)  NaCl (aq) + H2O (aq)
Dallas ISD - Example Items
EXAMPLE ITEMS Chemistry, Sem 2
Answer
SE
1
A
CHEM.9B
2G
2
C
CHEM.12C
--
3
C
CHEM.10I
2H
4
A
CHEM.10E
2H
5
B
CHEM.12B
--
6
D
CHEM.8E
2G
7
C
CHEM.11E
2G
8
B
CHEM.11D
2G
9
4
CHEM.9A
2G
10
C
CHEM.11C
2H
11
A
CHEM.12A
3A
12
C
CHEM.10J
--
13
D
CHEM.10B
--
14
C
CHEM.10F
2H
15
D
CHEM.10H
2G
Dallas ISD - Example Items
Process Skills