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