Download ANSWER KEY to physical and chemical properties practice test File

NAME____________________________________
Properties of Matter
DATE________________________
Matching
Match each item with the correct statement below. (2pts Each)
a. mixture
d. reactant
b. product
e. heterogeneous mixture
c. intensive property
f. vapor
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1.
2.
3.
4.
5.
Gaseous state of substance that is a liquid or solid at room temperature
A physical blend of two or more components
Not uniform in composition
A substance formed in a chemical reaction
Can be used to identify a substance.
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question. (2pts Each)
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6. All of the following are physical properties of a substance in the liquid state EXCEPT ____.
a. indefinite volume
c. not easily compressed
b. definite mass
d. indefinite shape
7. Which of the following is a heterogeneous mixture?
a. air
c. steel
b. salt water
d. soil
8. Which of the following CANNOT be considered a single phase?
a. a pure solid
c. a heterogeneous mixture
b. a pure liquid
d. a homogeneous mixture
9. Which of the following is a homogeneous mixture?
a. salt water
c. sand and water
b. beef stew
d. soil
____ 10. A substance that can be separated into two or more substances only by a chemical change is a(n) ____.
a. solution
c. mixture
b. element
d. compound
____ 11. What do chemical symbols and formulas represent, respectively?
a. atoms and mixtures
b. elements and compounds
c. compounds and mixtures
d. elements and ions
____ 12. Which of the following is a chemical property?
a. color
c. freezing point
b. hardness
d. ability to react with oxygen
____ 13. Separating a mixture of two liquids based on the differences in their boiling points is called?
a. filtration
b. sublimation
c. distillation
d. chromatography
____ 14. All of the following changes to a metal are physical changes EXCEPT ____.
a. bending
c. rusting
b. melting
d. polishing
____ 15. Which of the following does NOT involve a physical change?
a. mixing
c. grinding
b. decomposing
d. melting
____ 16. What clues might you check for to be certain that a chemical change has taken place?
a. Check for the production of a gas.
b. Demonstrate a transfer of energy has occurred.
c. Witness a color change.
d. All of the above.
____ 17. Which of the following indicates that a chemical change has happened during cooking?
a. The food darkens.
b. Bubbles form in boiling water.
c. Butter melts.
d. Energy is transferred from the stove to a pan.
____ 18. What happens to mass during a chemical reaction?
a. Some mass is destroyed.
b. Mass is neither destroyed nor created.
c. Some mass is created.
d. Some mass is destroyed and some is created.
____ 19. Which of the following is NOT a physical property of water?
a. It has a boiling point of 100 C.
b. It is a colorless liquid.
c. It is composed of hydrogen and oxygen.
d. Sugar dissolves in it.
____ 20. Which of the following are considered physical properties of a substance?
a. color and odor
c. malleability and hardness
b. melting and boiling points
d. all of the above
____ 21. A substance that forms a vapor is generally in what physical state at room temperature?
a. solid
c. gas
b. liquid
d. liquid or solid
____ 22. Which state of matter has a definite volume and takes the shape of its container?
a. solid
c. gas
b. liquid
d. both b and c
____ 23. Which of the following represents an intensive property?
a. length
c. mass
b. freezing point
d. all of the above
____ 24. Which state of matter expands when heated and is easy to compress?
a. gas
c. solid
b. liquid
d. all of the above
____ 25. Which of the following is true about homogeneous mixtures?
a. They are known as solutions.
b. They consist of two or more phases.
c. They have compositions that never vary.
d. They are always liquids.
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26 Which of the following items is NOT a compound?
a. baking soda
c. sugar
b. salad dressing
d. table salt
27. Which of the following materials is a pure substance?
a. air
c. stainless steel
b. gasoline
d. silver
28. What distinguishes a substance from a mixture?
a. Substances are compounds, and mixtures are not.
b. Mixtures are groupings of elements, and compounds are not.
c. Samples of the same substance can have different intensive properties.
d. Mixtures can be separated physically, while compounds cannot.
29. The chemical symbol for iron is ____.
a. fe
c. Fe
b. FE
d. Ir
30. Which of the following represents a compound?
a. H
c. H2O
b. H-3
d. O-16
31. In the chemical reaction in which sucrose is heated and decomposes to form carbon dioxide and water, which
of the following is a reactant?
a. sucrose
c. water
b. carbon dioxide
d. heat
32. Which action changes the identity of the substance referenced?
a. melting gold
b. running an electric current through copper
c. acid corroding iron
d. breaking an ice cube
Short Answer
Describe how you would separate each of the following mixture based on what you know about their physical properties.
Be thorough in your response (for questions 33-36). 4pts Each.
33. Sawdust and Sand.
Pour in water to the mixture; sawdust will float and sand will sink. Pour off (decant) the sawdust from the
sand to separate.
34. Iron and Sulfur.
Use a magnet as iron is magnetic and sulfur is not.
35. Sugar and Salt.
Dissolve the sugar in pure alcohol (ethanol) as salt will not. Filter out the salt and recrystallize the sugar by
boiling off the alcohol.
OR…melt the sugar which has a much lower melting point than salt. Filter out the salt and allow the sugar to
recrystallize by cooling or freezing.
36. Use the periodic table to name the following elements:
a.) U
Uranium
b.) W
Tungsten
c.) Ti
Titanium
d.) Co
Cobalt
Essay (5 points each)
37. State the law of conservation of mass. Then apply it to this question. If 22 grams of hydrogen reacts
completely with 17 grams of chlorine, what is the mass of hydrochloric acid?
In any chemical or physical reaction mass is conserved. It is neither created nor destroyed.
Bonus (5 points)
In general, a substance becomes less dense as temperature increases (the volume increases,
decreasing the density ratio). However, water is an important exception. Given what you know
about the physical properties of water, why is biologically important that water in its solid form (ice)
is less dense than its liquid form?
Properties of Matter
Answer Section
MATCHING
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3.
4.
5.
ANS:
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F
A
E
B
D
DIF:
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DIF:
L1
L1
L1
L1
L1
REF:
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REF:
p. 42
p. 44
p. 45
p. 53
p. 53
OBJ:
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2.1.3
2.2.1
2.2.2
2.4.1
2.4.1
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L1
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L2
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L1
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L2
L3
L2
L1
L2
L2
L1
L1
L1
L2
L2
L1
L2
L2
L3
L1
L1
L1
L2
L1
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p. 39
p. 41
p. 45
p. 45
p. 45
p. 46
p. 48
p. 51
p. 52
p. 51
p. 53
p. 53
p. 53
p. 53
p. 54
p. 54
p. 55
p. 40
p. 40
p. 42
p. 41
p. 41
p. 42
p. 42
p. 45
p. 50
p. 50
p. 50, p. 51
p. 51
p. 51
p. 53
p. 53
p. 55
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2.1.1
2.1.3
2.2.2
2.2.2
2.2.2
2.2.3
2.3.1
2.3.3
2.3.3
2.3.3
2.4.1
2.4.1
2.4.1
2.4.1
2.4.1
2.1.4, 2.4.1, 2.4.2
2.4.3
2.1.2
2.1.2
2.1.3
2.1.3
2.1.3
2.1.3
2.1.4
2.2.2
2.3.1
2.3.2
2.3.2
2.3.3
2.3.3
2.4.1
2.1.4, 2.4.1, 2.4.2
2.4.3
MULTIPLE CHOICE
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B
A
D
D
A
D
D
C
B
A
D
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C
A
A
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D
D
B
C
A
C
A
B
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C
A
C
D
ESSAY
39. ANS:
Physical changes do not alter the composition of a substance, but chemical changes do. When water is boiled,
the resulting gas is still water. However, when water is broken down into hydrogen and oxygen in a chemical
reaction, the water no longer exists. The latter is a chemical change; the former a physical change.
DIF: L2
REF: p. 42, p. 53
OBJ: 2.1.2, 2.4.1