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