Grade 10
Objective 4
1
The same amount of hydrogen gas is in both containers. The
pressure in Container B is —
A
B
C
D
1
4
1
2
the pressure in Container A
the pressure in Container A
2 times the pressure in Container A
4 times the pressure in Container A
2
What is the density at 20°C of 12.0 milliliters of a liquid that has a
mass of 4.05 grams?
A
B
C
D
0.338 g/mL
2.96 g/mL
16.1 g/mL
48.6 g/mL
3
What is the mass of a 500.00 mL sample of seawater with a density
of 1.025 g/mL?
F 487.8 g
G 500.0 g
H 512.5 g
J 625.0 g
4
Which of the following objects will float on water?
A
C
B
D
5
Students in a chemistry lab measure the time it takes four different
100 mL solutions to pass through a hole in the bottom of a cup.
Which of the following properties of the solutions is most likely being
measured?
F
G
H
J
Buoyancy
Mass
Viscosity
Volume
6
A sample of water from a stream has a greater density than a
sample of distilled water. Which is the best explanation for the
difference in density?
A
B
C
D
Streams have kinetic energy.
Distilled water has a neutral pH.
Streams can contain dissolved salts.
Distilled water can contain dissolved gases.
7
The experiment illustrates that
iron and sulfur combine to form —
A
B
C
D
a nonmetal
a compound
a mixture
an alloy
8
The picture shows a model of the element —
A
B
C
D
fluorine
helium
beryllium
oxygen
9
Oxygen (O2) is an example of —
A
B
C
D
an alloy
a molecule
a salt
a mixture
10
An unknown silvery powder has a constant melting point and
does not chemically or physically separate into other substances.
The unknown substance can be classified as —
A
B
C
D
an element
a compound
a mixture
an alloy
11
Which of these are composed of two or more different substances
that are chemically combined in a definite ratio?
F
G
H
J
Compounds
Mixtures
Elements
Solutions
12
Which of these represents a physical change?
A
B
C
D
Iron rusting
Ice melting
Wood burning
Food spoiling
13
Texas horned lizards must eat a large number of harvester ants
each day. The formic acid in the harvester ants helps neutralize a
base that the lizard produces. The products from this reaction would
be —
A
B
C
D
an acid and a base
a salt and water
an acid and water
a salt and a base
14
In the rock cycle, which of these is a chemical change involved
with the formation of igneous rocks?
F Compression of sediments
G Heat loss from lava
H Subduction of plates
J Formation of minerals
15
Which of the following is an example of a chemical change?
F Ice cracking
G Sugar dissolving
H Milk souring
J Lead melting
16
Which of these describes a pollution-producing process that
involves only a physical change?
A
B
C
D
Coal with a high sulfur content is burned, producing gases
that cause acid rain.
Chlorofluorocarbons are released, changing ozone in the
upper atmosphere into oxygen.
Hot wastewater is discharged into a lake, lowering oxygen
levels in the water.
Nitrogen oxide emissions combine with water vapor,
producing nitric acid.
17
Rust (Fe2O3) forms on an iron (Fe) pipe after prolonged
exposure to humid air. What type of change does this illustrate?
F
G
H
J
Mechanical
Nuclear
Chemical
Physical
18
Sheets of ice containing mostly pure water can be formed by
decreasing the temperature of saltwater. Which of these best
describes this change?
F
G
H
J
Chemical change
Physical change
Nuclear change
Atomic change
19
The reaction equation below shows the process of oxidizing iron.
Balance the equation by calculating the coefficients.
A
B
C
D
2, 3, 1
1, 1, 1
4, 3, 2
4, 2, 2
20
To produce 4 molecules of sugar, a plant needs —
F 6 molecules of hydrogen
G 12 molecules of ATP
H 18 molecules of water
J 24 molecules of carbon dioxide
21
What are the coefficients that will balance this chemical
equation?
A
B
C
D
2, 1, 1
3, 4, 2
2, 2, 1
4, 3, 2
22
The illustrations show a conservation-of-mass
experiment. The solution in the beaker lost
mass because —
F
materials have less mass at
high temperatures
G the mass of the reactants and
products was less than 100 g
H sodium sulfate (Na2SO4) is
lighter than air
J some of the water molecules
turned into gas
Carbon monoxide (CO) burns readily in oxygen (O2),
forming carbon dioxide (CO2):
__CO(g) + __O2(g) ® __CO2(g)
23
What coefficient values will balance the reaction shown above?
A
B
C
D
2, 2, 1
1, 1, 1
2, 1, 2
1, 2, 2
24
In the procedure shown above, a calcium chloride solution is mixed with a sodium
sulfate solution to create the products shown. Which of the following is illustrated
by this activity?
F
G
H
J
The law of conservation of mass
The theory of thermal equilibrium
The law of conservation of momentum
The theory of covalent bonding
25
One reason water is an effective solvent is that it —
A
B
C
D
contains an oxygen atom
is a polar molecule
has a freezing point of 0°C
can evaporate easily
26
What characteristic of water remains the same no matter what is
dissolved in it?
A
B
C
D
The ratio of hydrogen to oxygen
The ability to refract light
The hydroxide ion concentration
The freezing temperature
27
Which factor makes water an effective solvent?
F The presence of molecular oxygen
G Its lack of covalent bonds
H The polar nature of its molecules
J Its abundance on Earth’s surface
28
Which of these is a reason that frogs and fish are sensitive to
changes in water temperature?
A
Cold water has a higher concentration of dissolved oxygen
than warm water.
B Warm water has a higher range of compressibility than cold
water.
C Cold water has a greater density than warm water.
D Warm water has a higher viscosity than cold water.
Solubility Rules
1. All sodium, potassium, and ammonium salts are soluble.
2. All silver, lead, and mercury salts are insoluble.
3. All carbonates, sulfides, and hydroxides are insoluble.
4. All sulfates are soluble except calcium sulfate and barium sulfate.
29
Which of the following salts has the greatest solubility in water
at 25°C?
F
CaCO3
G
FeS
H
HgCl2
J
KClO4
30
As a scuba diver goes deeper underwater, the diver must be aware
that the increased pressure affects the human body by
increasing the —
A
B
C
D
body’s temperature
amount of dissolved gases in the body
amount of suspended solids in the body
concentration of minerals in the body
31
A recipe calls for 210 grams of sugar to be dissolved in 0.25 liter of
water. After the mixture is stirred, some sugar crystals remain in the
water. What can be added to the mixture to help dissolve the
remaining sugar crystals?
A
B
C
D
Thermal energy
2.0 g of baking soda
Ice cubes
2.0 g of sodium chloride
Grade 10
Objective 4
Answer Key
Grade 10 Objective 4 Answer Key
Question
Correct
Answer
Objective
Measured
Student
Expectation
1
C
4
IPC 7A
2004 Info Booklet – 16
2
A
4
IPC 7A
2003 TAKS – 31
3
H
4
IPC 7A
2004 TAKS – 18
4
D
4
IPC 7A
2004 TAKS – 27
5
H
4
IPC 7A
2006 TAKS – 22
6
C
4
IPC 7A
2006 TAKS – 29
7
C
4
IPC 7E
2004 Info Booklet - 18
8
C
4
IPC 7E
2003 TAKS – 5
9
B
4
IPC 7E
2003 TAKS – 9
10
A
4
IPC 7E
2004 TAKS – 29
11
F
4
IPC 7E
2006 TAKS – 32
12
B
4
IPC 8A
2004 Info Booklet – 19
13
B
4
IPC 8A
2004 Info Booklet – 29
14
J
4
IPC 8A
2003 TAKS – 36
15
H
4
IPC 8A
2004 TAKS – 22
16
C
4
IPC 8A
2004 TAKS - 31
Source - item number
Grade 10 Objective 4 Answer Key
Question
Correct
Answer
Objective
Measured
Student
Expectation
17
H
4
IPC 8A
2006 TAKS – 12
18
G
4
IPC 8A
2006 TAKS – 18
19
C
4
IPC 8C
2004 Info Booklet – 17
20
J
4
IPC 8C
2003 TAKS – 10
21
C
4
IPC 8C
2003 TAKS – 45
22
J
4
IPC 8C
2004 TAKS – 30
23
C
4
IPC 8C
2006 TAKS – 9
24
F
4
IPC 8C
2006 TAKS – 40
25
B
4
IPC 9A
2002 Info Booklet – 12
26
A
4
IPC 9A
2003 TAKS – 41
27
H
4
IPC 9A
2004 TAKS – 24
28
A
4
IPC 9D
2004 Info Booklet – 20
29
J
4
IPC 9D
2003 TAKS – 50
30
B
4
IPC 9D
2004 TAKS – 9
31
A
4
IPC 9D
2006 TAKS - 37
Source - item number