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, Chapter 1: Chemistry: The Science of ChangeChapter 1: Chemistry: The Science of Change
1. What is a unifying principle that explains a body of experimental observations?
A) Law B) Hypothesis C) Theory D) Phenomena E) Prediction
Ans: C Difficulty: Easy
2. What is defined as a tentative explanation for observations that are made that result in
the formulation of this concept?
A) Law B) Hypothesis C) Theory D) Phenomena E) Prediction
Ans: B Difficulty: Easy
3. What is term used for findings that are summarized based on a pattern or trend?
A) Law B) Hypothesis C) Theory D) Phenomena E) Prediction
Ans: A Difficulty: Easy
4. Which of the following activities is not a part of good science?
A) Proposing a theory D) Designing experiments
B) Developing a hypothesis E) Indulging in speculation
C) Making quantitative observations
Ans: E Difficulty: Easy
5. Which one of the following is a "substance" in the sense of the word as used in your
textbook?
A) Air B) Tap water C) Sea water D) Water E) Toothpaste
Ans: D Difficulty: Medium
6. Which of the following cannot be separated into a simpler substance by chemical
means?
A) Element D) Homogeneous mixture
B) Emulsion E) Heterogeneous mixture
C) Compound
Ans: A Difficulty: Medium
7. If a liquid contains 60% sugar and 40% water throughout its composition then what is it
called?
A) Solute D) Heterogeneous mixture
B) Compound E) Solvent
C) Homogeneous mixture
Page 1
© 2012 by McGraw-Hill Education. This is proprietary material solely for authorized instructor use. Not authorized for sale or distribution in any
manner. This document may not be copied, scanned, duplicated, forwarded, distributed, or posted on a website, in whole or part.
, Chapter 1: Chemistry: The Science of Change
Ans: C Difficulty: Medium
8. Which of the following does not have a uniform composition throughout?
A) Element D) Heterogeneous mixture
B) Compound E) Solvent
C) Homogeneous mixture
Ans: D Difficulty: Easy
9. Which of the following is not an S.I. base unit?
A) Meter B) Ampere C) Second D) Gram E) Kelvin
Ans: D Difficulty: Medium
10. The S.I. base unit of mass is
A) mg B) g C) kg D) metric ton E) lb
Ans: C Difficulty: Medium
11. The S.I. prefix mega- (M) means
A) 10-6 B) 10-3 C) 103 D) 106 E) 109
Ans: D Difficulty: Easy
12. The SI prefixes milli and mega represent, respectively:
A) 106 and 10-6 D) 10– 3 and 109
B) 10– 3 and 106 E) 10– 6 and 10– 3
C) 103 and 10– 6
Ans: B Difficulty: Medium
13. How many micrograms are in 65.3kg?
A) 0.653 g D) 6.53 10-8 g
B) 6.53 107 g E) 6.53 1010 g
C) 6.53 104 g
Ans: E Difficulty: Difficult
14. A dose of medication was prescribed to be 35 microliters. Which of the following
expresses that volume in centiliters?
A) 3.5 105 cL D) 3.5 10-4 cL
B) 3.5 104 cL E) 3.5 10-3 cL
Page 2
© 2012 by McGraw-Hill Education. This is proprietary material solely for authorized instructor use. Not authorized for sale or distribution in any
manner. This document may not be copied, scanned, duplicated, forwarded, distributed, or posted on a website, in whole or part.
, Chapter 1: Chemistry: The Science of Change
C) 3.5 cL
Ans: E Difficulty: Difficult
15. How many milliliters is 0.0055 L?
A) 0.55 mL B) 5.5 mL C) 0.5 mL D) 0.0000055 mL E) 182 mL
Ans: B Difficulty: Medium
16. How many hertz is 600.11 MHz?
A) 6.0011 10-4 Hz D) 6.0011 10-2 Hz
B) 60.011 Hz E) 6.0011 108 Hz
C) 6.0011 106 Hz
Ans: E Difficulty: Medium
17. The distance between carbon atoms in ethylene is 134 picometers. Which of the
following expresses that distance in meters?
A) 1.34 10-13 m D) 1.34 10-7 m
B) 1.34 10-12 m E) 1.34 10-6 m
C) 1.34 10-10 m
Ans: C Difficulty: Medium
18. Which of these quantities represents the largest mass?
A) 2.0 102 mg D) 2.0 102 cg
B) 0.0010 kg E) 10.0 dg
C) 1.0 105 g
Ans: D Difficulty: Difficult
19. The mass of a sample is 550 milligrams. Which of the following expresses that mass in
kilograms?
A) 5.5 108 kg D) 5.5 10-6 kg
B) 5.5 105 kg E) 5.5 10-1 kg
C) 5.5 10-4 kg
Ans: C Difficulty: Difficult
Page 3
© 2012 by McGraw-Hill Education. This is proprietary material solely for authorized instructor use. Not authorized for sale or distribution in any
manner. This document may not be copied, scanned, duplicated, forwarded, distributed, or posted on a website, in whole or part.
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