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