,Chapter01:Introduction
c c
1. A tentative explanation for a set of observations that can be tested by
cc cc cc cc cc cc cc cc cc cc cc cc
furtherexperimentation is referred to as
cc cc cc cc cc
A) a hypothesis. B) a law.
cc C) a theory. cc cc
D) none of the above.Ans: A cc Category: Easy
cc cc
Section: 1.2
cc cc
2. A concise verbal or mathematical statement of a relationship between phenomena that
cc cc cc cc cc cc cc cc cc cc cc
isalways the same under the same conditions is referred to as
cc cc cc cc cc cc cc cc cc cc cc
A) a hypothesis. B) a law.
cc C) a theory. cc cc
D) none of the above.Ans: B ccCategory: Easycc cc
Section: 1.2
cc cc
3. A unifying principle that explains a body of facts and relations is referred to as
cc cc cc cc cc cc cc cc cc cc cc cc cc cc
A) a hypothesis. B) a law.
cc C) a theory. cc cc
D) none of the above.Ans: C ccCategory: Easycc cc
Section: 1.2
cc cc
4. Complete the following sentence. A hypothesis is
cc cc cc cc cc
A) a tentative explanation for a set of observations that can be tested by
cc cc cc cc cc cc cc cc cc cc cc cc
furtherexperimentation.
cc
B) a statement describing a relationship between phenomena that is always the
cc cc cc cc cc cc cc cc cc cc
sameunder the same conditions.
cc cc cc cc
C) a unifying principle that explains a body of facts and relations.
cc cc cc cc cc cc cc cc cc cc
D) a model used to visualize the
cc cc cc cc cc
invisible.Ans: A
cc Category:
Easy Section: 1.2
5. Complete the following sentence. A scientific law is
cc cc cc cc cc cc
A) a tentative explanation for a set of observations that can be tested by
cc cc cc cc cc cc cc cc cc cc cc cc
furtherexperimentation.
cc
B) a statement describing a relationship between phenomena that is always the
cc cc cc cc cc cc cc cc cc cc
sameunder the same conditions.
cc cc cc cc
C) a unifying principle that explains a body of facts and relations.
cc cc cc cc cc cc cc cc cc cc
D) a model used to visualize the
cc cc cc cc cc
invisible.Ans: B
cc Category:
Easy Section: 1.2
6. Complete the following sentence. A theory is
cc cc cc cc cc
A) a tentative explanation for a set of observations that can be tested by
cc cc cc cc cc cc cc cc cc cc cc cc
furtherexperimentation.
cc
B) a statement describing a relationship between phenomena that is always the
cc cc cc cc cc cc cc cc cc cc
sameunder the same conditions.
cc cc cc cc
C) a unifying principle that explains a body of facts and relations.
cc cc cc cc cc cc cc cc cc cc
D) a model used to visualize the
cc cc cc cc cc
invisible.Ans: C
cc Category:
Easy
cc Section: 1.2
Page 1 cc
, Chapter 01: Introduction cc cc
7. Choose the response that includes all the items listed below that are pure substances.
cc cc cc cc cc cc cc cc cc cc cc cc cc
i. orange juice ii. steam iii. ocean water iv. oxygen v. vegetable soup
cc cc cc cc cc cc cc cc
A) i, iii, v cc B) ii, iv C) i, iii, iv D) iv only E) all
cc cc cc cc cc cc cc
of them are pureAns: B Category: Easy Section: 1.2
cc cc cc cc c cc
8. Which of the following is an example of a physical property?
cc cc cc cc cc cc cc cc cc cc
A) corrosiveness of sulfuric acid cc cc cc
B) toxicity of cyanide cc cc
C) flammability of gasoline cc cc
D) neutralization of stomach acid with an antacid cc cc cc cc cc cc
E) lead becomes a liquid when heated to 601 C
cc cc cc cc cc cc cc
Ans: E Category: Easy Section: 1.4
cc cc c c cc
9. Which one of the following is an example of a physical property?
cc cc cc cc cc cc cc cc cc cc cc
A) dynamite explodes D) ice floats on top of liquid water cc cc cc cc cc cc cc
B) meat rots if it is not refrigerated E) cca silver platter tarnishes cc cc cc cc cc cc cc cc
C) gasoline burns cc
Ans: D Category: Easy Section: 1.4 c c c c
10. Which one of the following represents a physical change?
cc cc cc cc cc cc cc cc
A) water, when heated to 100 C, forms steam cc cc cc cc cc cc
B) bleach turns hair yellow cc cc cc
C) sugar, when heated, becomes brown cc cc cc cc
D) milk turns sour cc cc
E) apples, when exposed to air, turn cc cc cc cc cc
brownAns: A
cc Category:
Easy Section: 1.4
11. All of the following are properties of sodium. Which one is a physical
cc cc cc cc cc cc cc cc cc cc cc cc
property ofsodium?
cc cc
A) It is a surface turns black when first exposed to air.
cc cc cc cc cc cc cc cc cc cc
B) It is a solid at 25 C and changes to a liquid when heated to 98 C.
cc cc cc cc cc cc cc cc cc cc cc cc cc cc
C) When placed in water it sizzles and a gas is formed. cc cc cc cc cc cc cc cc cc cc
D) When placed in contact with chlorine it forms a compound that melts at 801 C.
cc cc cc cc cc cc cc cc cc cc cc cc cc
E) Sodium is never found as the pure metal in cc cc cc cc cc cc cc cc
nature.Ans: B
cc Category: Easy
Section: 1.4 cc
12. All of the following are properties of tin. Which one is a chemical property of tin?
cc cc cc cc cc cc cc cc cc cc cc cc cc cc
A) Tin can be hammered into a thin sheet.
cc cc cc cc cc cc cc
B) At –40 C a sheet of tin crumbles to a gray powder.
cc cc cc cc cc cc cc cc cc cc
C) Tin melts at 231.9 C. cc cc cc
D) When a bar of tin is bent, it emits an audible ―cry‖. cc cc cc cc cc cc cc cc cc cc cc
E) Tin erodes when added to hydrochloric acid, and a clear gas
cc cc cc cc cc cc cc cc cc cc
forms.Ans: E
cc Category: Medium Section: 1.4 cc
Page 2 cc
, Chapter 01: Introduction cc cc
13. Which one of the following represents a chemical change?
cc cc cc cc cc cc cc cc
A) boiling water to form steam cc cc cc cc
B) burning a piece of coal cc cc cc cc
C) heating lead until it melts cc cc cc cc
D) mixing iron filings and sand at room temperature cc cc cc cc cc cc cc
E) breaking glass cc
Ans: B Category: Medium Section: 1.4 c c c c cc
14. Which of the following does not represent a chemical change?
cc cc cc cc cc cc cc cc cc
A) a freshly cut apple turns brown
cc cc cc cc cc
B) milk turns sour on standing at room temperature
cc cc cc cc cc cc cc
C) when cooled to 0 C, liquid water becomes ice cc cc cc cc cc cc cc
D) frying an egg cc cc
E) fermentation of sugar to alcohol cc cc cc cc
Ans: C Category: Easy
cc cc
Section:
c c
1.4
15. 1T5 .h e SI prefixes nano and deci represent, respectively:
cc cc cc cc cc cc cc
A) 10–9 and 10–6. cc D) 109 and 10–6. cc cc cc
–3
6
B) 10 and 10 . cc E) 10–9 and 10–1. cc cc cc
C) 103 and 10–3. cc cc
Ans: E Category: Easy Section:
c c c c
1.7
16. 16.
The SI prefixes milli and mega represent, respectively:
cc cc cc cc cc cc cc
A) 106 and 10–6. cc D) 10–3 and 109. cc cc cc
B) 10–3 and 106. cc E) 10–6 and 10–3. cc cc cc
3 –6
C) 10 and 10 . cc cc
17. The SI prefixes kilo and centi represent, respectively:
cc cc cc cc cc cc cc
A) 103 and 10–2. cc D) 10–6 and 102. cc cc c c
B) 106 and 10–1. cc E) 102 and 10–3. cc c c c c
–3 –2
C) 10 and 10 . cc cc
Ans: A Category: Easy Section: 1.7 c c c c
18. A nanometer corresponds to:
cc cc cc
A) 10–2 meters. D) cc 10–9 meters.c c
–3
B) 10 meters. E) cc 10–12 meters. cc
C) 10–6 meters. cc
Ans: D Category: Easy Section: 1.7 c c c c
19. A microliter corresponds to:
cc cc cc
A) 10–2 liters. B) 10–3 liters.C)
c c cc c 10–6 liters. D) 10–9 liters. E) 10– 12
cc cc cc cc cc cc
liters.Ans: C Category: Easy c c c c Section: 1.7 cc
Page 3 cc
c c
1. A tentative explanation for a set of observations that can be tested by
cc cc cc cc cc cc cc cc cc cc cc cc
furtherexperimentation is referred to as
cc cc cc cc cc
A) a hypothesis. B) a law.
cc C) a theory. cc cc
D) none of the above.Ans: A cc Category: Easy
cc cc
Section: 1.2
cc cc
2. A concise verbal or mathematical statement of a relationship between phenomena that
cc cc cc cc cc cc cc cc cc cc cc
isalways the same under the same conditions is referred to as
cc cc cc cc cc cc cc cc cc cc cc
A) a hypothesis. B) a law.
cc C) a theory. cc cc
D) none of the above.Ans: B ccCategory: Easycc cc
Section: 1.2
cc cc
3. A unifying principle that explains a body of facts and relations is referred to as
cc cc cc cc cc cc cc cc cc cc cc cc cc cc
A) a hypothesis. B) a law.
cc C) a theory. cc cc
D) none of the above.Ans: C ccCategory: Easycc cc
Section: 1.2
cc cc
4. Complete the following sentence. A hypothesis is
cc cc cc cc cc
A) a tentative explanation for a set of observations that can be tested by
cc cc cc cc cc cc cc cc cc cc cc cc
furtherexperimentation.
cc
B) a statement describing a relationship between phenomena that is always the
cc cc cc cc cc cc cc cc cc cc
sameunder the same conditions.
cc cc cc cc
C) a unifying principle that explains a body of facts and relations.
cc cc cc cc cc cc cc cc cc cc
D) a model used to visualize the
cc cc cc cc cc
invisible.Ans: A
cc Category:
Easy Section: 1.2
5. Complete the following sentence. A scientific law is
cc cc cc cc cc cc
A) a tentative explanation for a set of observations that can be tested by
cc cc cc cc cc cc cc cc cc cc cc cc
furtherexperimentation.
cc
B) a statement describing a relationship between phenomena that is always the
cc cc cc cc cc cc cc cc cc cc
sameunder the same conditions.
cc cc cc cc
C) a unifying principle that explains a body of facts and relations.
cc cc cc cc cc cc cc cc cc cc
D) a model used to visualize the
cc cc cc cc cc
invisible.Ans: B
cc Category:
Easy Section: 1.2
6. Complete the following sentence. A theory is
cc cc cc cc cc
A) a tentative explanation for a set of observations that can be tested by
cc cc cc cc cc cc cc cc cc cc cc cc
furtherexperimentation.
cc
B) a statement describing a relationship between phenomena that is always the
cc cc cc cc cc cc cc cc cc cc
sameunder the same conditions.
cc cc cc cc
C) a unifying principle that explains a body of facts and relations.
cc cc cc cc cc cc cc cc cc cc
D) a model used to visualize the
cc cc cc cc cc
invisible.Ans: C
cc Category:
Easy
cc Section: 1.2
Page 1 cc
, Chapter 01: Introduction cc cc
7. Choose the response that includes all the items listed below that are pure substances.
cc cc cc cc cc cc cc cc cc cc cc cc cc
i. orange juice ii. steam iii. ocean water iv. oxygen v. vegetable soup
cc cc cc cc cc cc cc cc
A) i, iii, v cc B) ii, iv C) i, iii, iv D) iv only E) all
cc cc cc cc cc cc cc
of them are pureAns: B Category: Easy Section: 1.2
cc cc cc cc c cc
8. Which of the following is an example of a physical property?
cc cc cc cc cc cc cc cc cc cc
A) corrosiveness of sulfuric acid cc cc cc
B) toxicity of cyanide cc cc
C) flammability of gasoline cc cc
D) neutralization of stomach acid with an antacid cc cc cc cc cc cc
E) lead becomes a liquid when heated to 601 C
cc cc cc cc cc cc cc
Ans: E Category: Easy Section: 1.4
cc cc c c cc
9. Which one of the following is an example of a physical property?
cc cc cc cc cc cc cc cc cc cc cc
A) dynamite explodes D) ice floats on top of liquid water cc cc cc cc cc cc cc
B) meat rots if it is not refrigerated E) cca silver platter tarnishes cc cc cc cc cc cc cc cc
C) gasoline burns cc
Ans: D Category: Easy Section: 1.4 c c c c
10. Which one of the following represents a physical change?
cc cc cc cc cc cc cc cc
A) water, when heated to 100 C, forms steam cc cc cc cc cc cc
B) bleach turns hair yellow cc cc cc
C) sugar, when heated, becomes brown cc cc cc cc
D) milk turns sour cc cc
E) apples, when exposed to air, turn cc cc cc cc cc
brownAns: A
cc Category:
Easy Section: 1.4
11. All of the following are properties of sodium. Which one is a physical
cc cc cc cc cc cc cc cc cc cc cc cc
property ofsodium?
cc cc
A) It is a surface turns black when first exposed to air.
cc cc cc cc cc cc cc cc cc cc
B) It is a solid at 25 C and changes to a liquid when heated to 98 C.
cc cc cc cc cc cc cc cc cc cc cc cc cc cc
C) When placed in water it sizzles and a gas is formed. cc cc cc cc cc cc cc cc cc cc
D) When placed in contact with chlorine it forms a compound that melts at 801 C.
cc cc cc cc cc cc cc cc cc cc cc cc cc
E) Sodium is never found as the pure metal in cc cc cc cc cc cc cc cc
nature.Ans: B
cc Category: Easy
Section: 1.4 cc
12. All of the following are properties of tin. Which one is a chemical property of tin?
cc cc cc cc cc cc cc cc cc cc cc cc cc cc
A) Tin can be hammered into a thin sheet.
cc cc cc cc cc cc cc
B) At –40 C a sheet of tin crumbles to a gray powder.
cc cc cc cc cc cc cc cc cc cc
C) Tin melts at 231.9 C. cc cc cc
D) When a bar of tin is bent, it emits an audible ―cry‖. cc cc cc cc cc cc cc cc cc cc cc
E) Tin erodes when added to hydrochloric acid, and a clear gas
cc cc cc cc cc cc cc cc cc cc
forms.Ans: E
cc Category: Medium Section: 1.4 cc
Page 2 cc
, Chapter 01: Introduction cc cc
13. Which one of the following represents a chemical change?
cc cc cc cc cc cc cc cc
A) boiling water to form steam cc cc cc cc
B) burning a piece of coal cc cc cc cc
C) heating lead until it melts cc cc cc cc
D) mixing iron filings and sand at room temperature cc cc cc cc cc cc cc
E) breaking glass cc
Ans: B Category: Medium Section: 1.4 c c c c cc
14. Which of the following does not represent a chemical change?
cc cc cc cc cc cc cc cc cc
A) a freshly cut apple turns brown
cc cc cc cc cc
B) milk turns sour on standing at room temperature
cc cc cc cc cc cc cc
C) when cooled to 0 C, liquid water becomes ice cc cc cc cc cc cc cc
D) frying an egg cc cc
E) fermentation of sugar to alcohol cc cc cc cc
Ans: C Category: Easy
cc cc
Section:
c c
1.4
15. 1T5 .h e SI prefixes nano and deci represent, respectively:
cc cc cc cc cc cc cc
A) 10–9 and 10–6. cc D) 109 and 10–6. cc cc cc
–3
6
B) 10 and 10 . cc E) 10–9 and 10–1. cc cc cc
C) 103 and 10–3. cc cc
Ans: E Category: Easy Section:
c c c c
1.7
16. 16.
The SI prefixes milli and mega represent, respectively:
cc cc cc cc cc cc cc
A) 106 and 10–6. cc D) 10–3 and 109. cc cc cc
B) 10–3 and 106. cc E) 10–6 and 10–3. cc cc cc
3 –6
C) 10 and 10 . cc cc
17. The SI prefixes kilo and centi represent, respectively:
cc cc cc cc cc cc cc
A) 103 and 10–2. cc D) 10–6 and 102. cc cc c c
B) 106 and 10–1. cc E) 102 and 10–3. cc c c c c
–3 –2
C) 10 and 10 . cc cc
Ans: A Category: Easy Section: 1.7 c c c c
18. A nanometer corresponds to:
cc cc cc
A) 10–2 meters. D) cc 10–9 meters.c c
–3
B) 10 meters. E) cc 10–12 meters. cc
C) 10–6 meters. cc
Ans: D Category: Easy Section: 1.7 c c c c
19. A microliter corresponds to:
cc cc cc
A) 10–2 liters. B) 10–3 liters.C)
c c cc c 10–6 liters. D) 10–9 liters. E) 10– 12
cc cc cc cc cc cc
liters.Ans: C Category: Easy c c c c Section: 1.7 cc
Page 3 cc
