Test bank - Chemistry 6th Edition Gilbert Kirss | 9780393697308 | All Chapters Covered with Answers and Rationales

Chapter 1: Matter and Energy: The Origin of the Universe


MULTIPLE CHOICE

1. Which one of the following is a mixture?
a. an aqueous solution of sugar d. copper metal
b. pure water e. table salt (sodium chloride)
c. nitrogen gas
ANS: A DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

2. A pure substance ________
a. can not be separated into simpler substances by physical means.
b. can have a composition that varies from sample to sample.
c. must be an element.
d. has different chemical and physical properties depending on its source.
e. must be a compound.
ANS: A DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

3. An element ________
a. can be separated into its components by physical methods.
b. may have different chemical properties depending on its source.
c. cannot be separated into simpler substances by chemical methods.
d. can also be a compound.
e. exists only as an atom and not as a molecule.
ANS: C DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

4. Which of the following is not a pure substance?
a. air d. argon gas
b. nitrogen gas e. table salt (sodium chloride)
c. oxygen gas
ANS: A DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

5. Which of the following is a pure substance?
a. mineral water d. sucrose (table sugar)
b. blood e. beer
c. brass (an alloy of copper and zinc)
ANS: D DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

6. Which of the following is an element?

, a. Cl2 d. MgO
b. H2O e. HCl
c. NaCl
ANS: A DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

7. Which of the following depicts a heterogeneous mixture?
a.




b.




c.




d.




e. None of the above are heterogeneous mixtures.
ANS: D DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

8. Which of the following is not a homogeneous mixture?
a. vinegar d. antifreeze
b. Italian salad dressing e. ketchup
c. a can of soda
ANS: B DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

9. Which of the following is a heterogeneous mixture?
a. air d. brass (an alloy of copper and zinc)
b. sugar dissolved in water e. table salt (sodium chloride)
c. muddy river water
ANS: C DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

10. Which one of the following statements is not correct?
a. Sodium and chlorine are elements.
b. Sodium chloride (table salt) is a compound.
c. Sodium chloride is a pure substance.

, d. Sodium chloride is a heterogeneous mixture.
e. Sodium chloride added to water forms a solution.
ANS: D DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

11. A heterogeneous mixture ________
a. can only be separated into its components by chemical methods.
b. involves substances solely in the gas phase.
c. has non-uniform sample composition.
d. exclusively refers to substances in the same phase.
e. is also called a solution.
ANS: C DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

12. Orange juice with pulp is an example of ________
a. a pure substance. d. an element.
b. a heterogeneous mixture. e. a homogeneous mixture.
c. a compound.
ANS: B DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

13. Which one of the following is not a correct statement?
a. Vodka is a solution.
b. Water (H2O) is a compound.
c. Sodium chloride (table salt) is a compound.
d. Silver is an element.
e. Sugar dissolved in water is a heterogeneous mixture.
ANS: E DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

14. Which one of the following is not classified correctly?
a. Distilled water is a compound.
b. Gold is an element.
c. Air is a solution.
d. Table salt (sodium chloride) is a mixture.
e. Salad dressing is a suspension.
ANS: D DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

15. Which one of the following statements is not correct?
a. Helium is an element.
b. Table salt (sodium chloride) is a compound.
c. Water is a pure substance.
d. Air is a solution.
e. Elements occur only in the form of individual atoms.

, ANS: E DIF: Medium REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

16. Which one of the following statements is not correct?
a. A compound has a specific constant composition.
b. The composition of a mixture can vary.
c. A compound has specific constant properties.
d. The properties of a mixture can vary.
e. Mixtures can not be homogeneous.
ANS: E DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

17. Identify the incorrect statement(s). A solution ________
I. can be a solid, liquid, or gas.
II. can be heterogeneous or homogeneous.
III. is a homogeneous mixture.
a. Only I is incorrect. d. Both I and II are incorrect.
b. Only II is incorrect. e. Both I and III are incorrect.
c. Only III is incorrect.
ANS: B DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

18. Identify the incorrect statement(s). A pure substance can be ________
I. an element or a compound.
II. heterogeneous or homogeneous.
III. a solution.
a. Only I is incorrect. d. Both I and II are incorrect.
b. Only II is incorrect. e. Both II and III are incorrect.
c. Only III is incorrect.
ANS: E DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

19. Table sugar (sucrose) with the formula C12H22O11 is ________
I. an element.
II. a compound.
III. a mixture.
a. Only I d. Both I and III
b. Only II e. Both II and III
c. Only III
ANS: B DIF: Easy REF: 1.2
OBJ: Describe different forms of matter: distinguish between pure substances, solutions,
heterogeneous mixtures, elements, and compounds. MSC: Understanding

20. Which one of the following is not a chemical reaction?
a. dynamite exploding d. water turning to steam