Download CH 1 and 2 Test Answer Section

CH 1 and 2 Test
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
____
____
____
____
____
____
____
____
____
____
1. If repeated measurements agree closely but differ widely from the accepted value, these measurements are
a. neither precise nor accurate.
b. accurate, but not precise.
c. both precise and accurate.
d. precise, but not accurate.
2. Which of these symbols represents a unit of volume?
a. mL
c. mm
b. mg
d. cm
3. Organic chemistry is the study of
a. properties, changes, and relationships between energy and matter.
b. the chemistry of living things.
c. crystals and minerals.
d. carbon-containing compounds.
4. The density of aluminum is 2.70 g/cm3. What is the mass of a solid piece of aluminum with a volume of 1.50
cm3?
a. 0.556 g
c. 4.05 g
b. 1.80 g
d. 4.20 g
5. Which of the following observations is qualitative?
a. A chemical reaction was complete in 2.3 seconds.
b. The solid had a mass of 23.4 grams.
c. The pH of a liquid was 5.
d. Salt crystals formed as the liquid evaporated.
6. The number of significant figures in the measured value 0.032 0 g is
a. 2.
c. 4.
b. 3.
d. 5.
7. If a mixture is not uniform throughout, it is called
a. homogeneous.
c. chemically bonded.
b. heterogeneous.
d. a solution.
8. Basic research is usually performed
a. to develop new products.
b. to understand an environmental problem.
c. to gain knowledge.
d. to solve a particular problem.
9. Which of these measurements has been expressed to three significant figures?
a. 0.052 g
c. 3.065 g
b. 0.202 g
d. 500 g
–6
2
10. When 1.92  10 kg is divided by 6.8  10 mL, the quotient equals
a. 2.8  10–4 kg/mL.
c. 2.8  10–8 kg/mL.
b. 2.8  10–5 kg/mL.
d. 2.8  10–9 kg/mL.
11. Three samples of 1.12 g, 1.8 g, and 1.562 g are mixed together. The combined mass of the three samples,
expressed to the correct number of significant figures, would be recorded as
a. 4.4 g.
c. 4.482 g.
b. 4.48 g.
d. 4.5 g.
____ 12. Which of the following is not a chemical change?
a. rusting
c. melting
b. igniting
d. burning
____ 13. Which of the following observations is quantitative?
a. The liquid turns blue litmus paper red.
b. The liquid boils at 100ºC.
c. The liquid tastes bitter.
d. The liquid is cloudy.
____ 14. These values were recorded as the mass of products when a chemical reaction was carried out three separate
times: 8.83 g; 8.84 g; 8.82 g. The mass of products from that reaction is
8.60 g. The values are
a. accurate, but not precise.
b. precise, but not accurate.
c. both accurate and precise.
d. neither accurate nor precise.
____ 15. Which of these is a measure of the amount of material?
a. density
c. volume
b. weight
d. mass
____ 16. A mixture is
a. a combination of pure substances bonded chemically.
b. any substance with a uniform composition.
c. a blend of any two or more kinds of matter, as long as each maintains its own unique
properties.
d. any group of elements that are chemically bonded to one another.
____ 17. Which of the following is not a physical change?
a. grinding
c. boiling
b. cutting
d. burning
____ 18. How would 0.00930 m be expressed in scientific notation?
a. 93  10–4 m
c. 9.30  10–3 m
b. 9.3  10–4 m
d. 9.30  10–5 m
____ 19. The number of grams equal to 0.5 kg is
a. 0.0005.
c. 500.
b. 0.005.
d. 5000.
____ 20. The number of significant figures in the measurement 2010 cm is
a. 1.
c. 3.
b. 2.
d. 4.
____ 21. A chemical can be defined as
a. a toxic substance.
b. an unnatural additive placed in food.
c. any substance that has a definite composition.
d. any substance that is not alive.
____ 22. The symbol mm represents
a. micrometer.
c. milliliter.
b. millimeter.
d. meter.
8
____ 23. What is 1.245 633 501  10 rounded to four significant figures?
a. 1246
c. 1.246  108
8
b. 1.2456  10
d. 1.246  104
____ 24. A chemist obtained the values 5.2246 g, 5.2353 g, and 5.2501 g for the mass of a sample. Without knowing
the true mass of the sample, it can be said that these values have
a. good precision.
b. good accuracy.
c. poor precision.
d. poor accuracy.
____ 25. The horizontal rows on the periodic table are called
a. actinides.
c. elements.
b. families.
d. periods.
____ 26. Under ordinary conditions of temperature and pressure, the particles in a gas are
a. closely packed.
b. very far from one another.
c. held in fixed positions.
d. unevenly distributed.
____ 27. The dimensions of a rectangular solid are measured to be 1.27 cm, 1.3 cm, and 2.5 cm. The volume should be
recorded as
a. 4.128 cm3.
c. 4.13 cm3.
b. 4.12 cm3.
d. 4.1 cm3.
____ 28. A solid substance is
a. always frozen regardless of its container.
b. always a crystal regardless of its container.
c. always the same shape regardless of its container.
d. always losing particles regardless of its container.
____ 29. The SI base units for length and time are
a. centimeter and second.
c. centimeter and hour.
b. meter and hour.
d. meter and second.
____ 30. All of the following are examples of units except
a. mass.
c. gram.
b. kilometer.
d. ounce.
____ 31. Using a metric ruler with 1 mm divisions, the sides of a rectangular piece of plywood were measured as 3.54
cm and 4.85 cm, which corresponds to an area of 17.1690 cm2. Which of these shows the area expressed
correctly?
a. 17.1 cm2.
c. 17.17 cm2.
2
b. 17.169 cm .
d. 17.2 cm2.
____ 32. The measurement 0.020 L is the same as
a. 2.0  10–3 L.
c. 2.0  10–2 L.
2
b. 2.0  10 L.
d. 2.0  10–1 L.
____ 33. If a mixture is uniform in composition, it is said to be
a. homogeneous.
c. heterogeneous.
b. chemically bonded.
d. a compound.
____ 34. A numerical result is said to have good precision if
a. it agrees closely with an accepted value.
b. repeated measurements agree closely.
c. it has a small number of significant figures.
d. it is a large whole number.
____ 35. A measurement that closely agrees with an accepted value is best described as
a. precise.
c. significant.
b. reproducible.
d. accurate.
____ 36. 0.05 cm is the same as
a. 0.000 05 m.
c. 0.05 m.
b. 0.005 mm.
d. 0.5 mm.
____ 37. How many minutes are in 1 week?
a. 168 min
c. 10 080 min
b. 1440 min
d. 100 800 min
____ 38. A state of matter in which a material has no definite shape but has a definite volume is the ____ state.
a. gas
c. plasma
b. liquid
d. solid
____ 39. Inorganic chemistry is the study of
a. non-carbon related compounds.
b. the chemistry of living things.
c. mathematical modeling.
d. the identification of the composition of materials.
____ 40. The unit m3 measures
a. length.
c. volume.
b. area.
d. time.
____ 41. Which of the following is an extensive property of matter?
a. melting point
c. volume
b. boiling point
d. density
____ 42. Which of these measurements has been expressed to four significant figures?
a. 0.0020 mm
c. 30.00 mm
b. 0.0402 mm
d. 402.10 mm
____ 43. Matter includes all of the following except
a. air.
c. smoke.
b. light.
d. water vapor.
____ 44. The metric unit for length that is closest to the diameter of a pencil is the
a. micrometer.
c. centimeter.
b. millimeter.
d. decimeter.
____ 45. The liquid state of matter can be described as
a. having definite shape and definite volume.
b. having neither a definite shape nor a definite volume.
c. having lost electrons owing to energy content.
d. having a definite volume but not a definite shape.
____ 46. A measure of the quantity of matter is
a. density.
c. volume.
b. weight.
d. mass.
____ 47. The product of 13 cm and 5.7 cm is correctly reported as
a. 74 cm2.
c. 74.1 cm2.
2
b. 74.0 cm .
d. 75 cm2.
____ 48. 1.06 L of water is equivalent to
a. 0.001 06 mL.
c. 106 mL.
b. 10.6 mL.
d. 1060 mL.
____ 49. Metalloids are often
a. unreactive.
c. lanthanides.
b. semiconductors.
d. from outer space.
____ 50. Which of the following is an intensive property of matter?
a. amount of energy
c. volume
____ 51.
____ 52.
____ 53.
____ 54.
____ 55.
____ 56.
____ 57.
____ 58.
____ 59.
____ 60.
____ 61.
____ 62.
____ 63.
____ 64.
b. density
d. mass
How is the measurement 0.000 065 cm written in scientific notation?
a. 65  10–6 cm
c. 6.5  10–6 cm
b. 6.5  10–5 cm
d. 6.5  10–4 cm
The measurement 0.035550 g rounded off to two significant figures would be
a. 0.03 g.
c. 0.036 g.
b. 0.35 g.
d. 3.5  102 g.
A homogeneous mixture is also called
a. chemically bonded.
c. a solution.
b. a compound.
d. a solute.
Which of these metric units is used to measure mass?
a. m
c. g
b. mm
d. L
The number of significant figures in the measurement 0.000 305 kg is
a. 2.
c. 6.
b. 3.
d. 7.
Which of these statements does not describe a measurement standard?
a. Measurement standards avoid ambiguity.
b. Measurement standards must be unchanging.
c. A standard can be easily changed to suit the experiment.
d. Confusion is eliminated when the correct measurement is applied.
Which of these measurements has only nonsignificant zeros?
a. 0.0037 mL
c. 400. mL
b. 60.0 mL
d. 506 mL
A nonmetal is usually
a. brittle.
c. a good conductor.
b. malleable.
d. used to make jewelry.
The speed of light is 300 000 km/s. In scientific notation, this speed is written to one significant figure as
a. 3  105 km/s.
c. 3.  106 km/s.
5
b. 3.0  10 km/s.
d. 3.0  106 km/s.
For numbers less than 0.1, such as 0.06, the zeros to the right of the decimal point but before the first nonzero
digit
a. are significant.
b. show the decimal place of the first digit.
c. show that the zero on the left side of the decimal is not significant.
d. show uncertainty.
An analytical balance can measure mass to the nearest 0.0001 g. In scientific notation, the accuracy of the
balance would be expressed as
a. 1.0  10–3 g.
c. 1  104 g.
3
b. 1  10 g.
d. 1  10–4 g.
When 64.4 is divided by 2.00, the correct number of significant figures in the result is
a. 1.
c. 4.
b. 3.
d. 6.
The symbols for units of length in order from largest to smallest are
a. m, cm, mm, km.
c. km, mm, cm, m.
b. mm, m, cm, km.
d. km, m, cm, mm.
Which pair of quantities determines the density of a material?
a. mass and weight
c. volume and concentration
____ 65.
____ 66.
____ 67.
____ 68.
____ 69.
____ 70.
b. volume and weight
d. volume and mass
0.25 g is equivalent to
a. 250 kg.
c. 0.025 mg.
b. 250 mg.
d. 0.025 kg.
The quantity of matter per unit volume is
a. mass.
c. inertia.
b. weight.
d. density.
Biochemistry is the study of
a. properties, changes, and relationships between energy and matter.
b. the chemistry of living things.
c. crystals and minerals.
d. carbon-containing compounds.
100 milliliters is equivalent to
a. 1 hectoliter.
c. 1 centiliter.
b. 1 microliter.
d. 1 deciliter.
The vertical columns on the periodic table are called
a. periods.
c. groups.
b. rows.
d. elements.
The relationship between the mass m of a material, its volume V, and its density D is
a. D = mV.
c. D = m/V.
b. D = V/m.
d. D = m + v.
CH 1 and 2 Test
Answer Section
MULTIPLE CHOICE
1. ANS:
OBJ:
2. ANS:
OBJ:
3. ANS:
OBJ:
4. ANS:
D
1
A
2
D
2
C
PTS: 1
DIF: II
REF: 3
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: I
REF: 1
DIF: III
PTS: 1
REF: 2
DIF: II
OBJ: 4
REF: 1
PTS: 1
DIF: II
REF: 3
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: I
REF: 1
PTS: 1
DIF: II
REF: 3
PTS: 1
DIF: III
REF: 3
PTS: 1
DIF: III
REF: 3
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: II
REF: 1
PTS: 1
DIF: II
REF: 3
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: III
REF: 3
PTS: 1
DIF: II
REF: 2
Solution:
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
PTS:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
ANS:
OBJ:
1
D
2
B
2
B
5
C
3
B
2
D
4
D
3
C
2
B
2
B
1
D
3
C
5
D
2
C
4
C
5
20. ANS:
OBJ:
21. ANS:
OBJ:
22. ANS:
OBJ:
23. ANS:
OBJ:
24. ANS:
OBJ:
25. ANS:
OBJ:
26. ANS:
OBJ:
27. ANS:
OBJ:
28. ANS:
OBJ:
29. ANS:
OBJ:
30. ANS:
OBJ:
31. ANS:
OBJ:
32. ANS:
OBJ:
33. ANS:
OBJ:
34. ANS:
OBJ:
35. ANS:
OBJ:
36. ANS:
OBJ:
37. ANS:
C
2
C
1
B
2
C
3
C
1
D
3
B
3
D
3
C
3
D
2
A
1
D
2
C
4
A
5
B
1
D
1
D
5
C
PTS: 1
DIF: II
REF: 3
PTS: 1
DIF: I
REF: 1
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: III
REF: 3
PTS: 1
DIF: II
REF: 3
PTS: 1
DIF: I
REF: 3
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: III
REF: 3
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: II
REF: 3
PTS: 1
DIF: III
REF: 3
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: I
REF: 3
PTS: 1
DIF: I
REF: 3
PTS: 1
DIF: II
REF: 2
DIF: II
PTS: 1
REF: 2
DIF: II
OBJ: 5
REF: 2
PTS: 1
DIF: I
REF: 1
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: II
REF: 3
Solution:
PTS:
38. ANS:
OBJ:
39. ANS:
OBJ:
40. ANS:
OBJ:
41. ANS:
OBJ:
42. ANS:
1
A
3
A
2
C
2
C
1
C
OBJ:
43. ANS:
OBJ:
44. ANS:
OBJ:
45. ANS:
OBJ:
46. ANS:
OBJ:
47. ANS:
OBJ:
48. ANS:
OBJ:
49. ANS:
OBJ:
50. ANS:
OBJ:
51. ANS:
OBJ:
52. ANS:
OBJ:
53. ANS:
OBJ:
54. ANS:
OBJ:
55. ANS:
OBJ:
56. ANS:
OBJ:
57. ANS:
OBJ:
58. ANS:
OBJ:
59. ANS:
OBJ:
60. ANS:
OBJ:
61. ANS:
OBJ:
62. ANS:
OBJ:
63. ANS:
OBJ:
64. ANS:
OBJ:
65. ANS:
OBJ:
66. ANS:
2
B
1
C
2
D
3
D
1
A
3
D
5
B
4
B
1
B
4
C
2
C
5
C
2
B
2
C
1
A
2
A
4
A
4
B
2
D
4
B
3
D
2
D
4
B
5
D
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: III
REF: 3
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: II
REF: 3
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: III
REF: 3
PTS: 1
DIF: II
REF: 3
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: II
REF: 3
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: II
REF: 3
PTS: 1
DIF: II
REF: 3
PTS: 1
DIF: III
REF: 3
PTS: 1
DIF: I
REF: 3
PTS: 1
DIF: III
REF: 3
PTS: 1
DIF: III
REF: 3
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: I
REF: 2
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: I
REF: 2
OBJ:
67. ANS:
OBJ:
68. ANS:
OBJ:
69. ANS:
OBJ:
70. ANS:
OBJ:
2
B
2
D
5
C
3
C
4
PTS: 1
DIF: I
REF: 1
PTS: 1
DIF: II
REF: 2
PTS: 1
DIF: I
REF: 3
PTS: 1
DIF: I
REF: 2