,Chapter 01: Introduction
UO UO
1. A tentative explanation for a set of observations that can be tested by
UO UO UO UO UO UO UO UO UO UO UO UO UO
further experimentation is referred to as
UO UO UO UO UO
A) a hypothesis. B) a law.
UO C) a theory. U O UO U O UO
D) none of the above. Ans: A
U O UO Category: Easy
UO UO UO U O U O
Section: 1.2 U O
2. A concise verbal or mathematical statement of a relationship between phenomena
UO UO UO UO UO UO UO UO UO UO UO
that is always the same under the same conditions is referred to as
UO UO UO UO UO UO UO UO UO UO UO UO
A) a hypothesis. B) a law.
UO C) a theory. U O UO U O UO
D) none of the above. Ans: B
U O UO Category: Easy
UO UO UO U O U O
Section: 1.2 U O
3. A unifying principle that explains a body of facts and relations is referred to as
UO UO UO UO UO UO UO UO UO UO UO UO UO UO
A) a hypothesis. B) a law.
UO C) a theory. U O UO U O UO
D) none of the above. Ans: C
U O UO Category: Easy
UO UO UO U O U O
Section: 1.2 U O
4. Complete the following sentence. A hypothesis is
UO UO UO U O UO UO
A) a tentative explanation for a set of observations that can be tested by
UO UO UO UO UO UO UO UO UO UO UO UO UO
further experimentation. UO
B) a statement describing a relationship between phenomena that is always the
UO UO UO UO UO UO UO UO UO UO U
same under the same conditions.
O UO UO UO UO
C) a unifying principle that explains a body of facts and relations.
UO UO UO UO UO UO UO UO UO UO
D) a model used to visualize the invisi
UO UO UO UO UO UO
ble. Ans: A
UO U O
Category: Easy Section: 1.2 U O U O
5. Complete the following sentence. A scientific law is
UO UO UO U O UO UO UO
A) a tentative explanation for a set of observations that can be tested by
UO UO UO UO UO UO UO UO UO UO UO UO UO
further experimentation. UO
B) a statement describing a relationship between phenomena that is always the
UO UO UO UO UO UO UO UO UO UO U
same under the same conditions.
O UO UO UO UO
C) a unifying principle that explains a body of facts and relations.
UO UO UO UO UO UO UO UO UO UO
D) a model used to visualize the invisi
UO UO UO UO UO UO
ble. Ans: B
UO U O
Category: Easy Section: 1.2 U O U O
6. Complete the following sentence. A theory is
UO UO UO U O UO UO
A) a tentative explanation for a set of observations that can be tested by
UO UO UO UO UO UO UO UO UO UO UO UO UO
further experimentation. UO
B) a statement describing a relationship between phenomena that is always the
UO UO UO UO UO UO UO UO UO UO U
same under the same conditions.
O UO UO UO UO
C) a unifying principle that explains a body of facts and relations.
UO UO UO UO UO UO UO UO UO UO
D) a model used to visualize the invisi
UO UO UO UO UO UO
ble. Ans: C
UO U O
Category: Easy Section: 1.2 U O U O
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7. Choose the response that includes all the items listed below that are pure substances.
UO UO UO UO UO UO UO UO UO UO UO UO UO
i. orange juice ii. steam iii. ocean water iv. oxygen v. vegetable soup
UO UO UO UO UO UO UO UO
A) i, iii, v
U O UO B) ii, iv C) i, iii, iv D) iv only
UO U O UO U O UO UO U O UO
E) all of them are pure Ans: B U O Category: Easy
UO UO UO UO UO U O U O
Section: 1.2 U O
8. Which of the following is an example of a physical property?
UO UO UO UO UO UO UO UO UO UO
A) corrosiveness of sulfuric acid UO UO UO
B) toxicity of cyanide UO UO
C) flammability of gasoline UO UO
D) neutralization of stomach acid with an antacid UO UO UO UO UO UO
E) lead becomes a liquid when heated to 601
UO UO UO UO UO UO UO
C Ans: E
UO Category: Easy
U O U O
Section: 1.4 U O
9. Which one of the following is an example of a physical property?
UO UO UO UO UO UO UO UO UO UO UO
A) dynamite explodes D) ice floats on top of liquid water
UO UO UO UO UO UO UO
B) meat rots if it is not refrigerated
UO E) a silver platter tarnishes
UO UO UO UO UO UO UO UO
C) gasoline burns UO
Ans: D Category: Easy Section: 1.4
U O U O U O
10. Which one of the following represents a physical change?
UO UO UO UO UO UO UO UO
A) water, when heated to 100 C, forms steam
UO UO UO UO UO UO
B) bleach turns hair yellow UO UO UO
C) sugar, when heated, becomes brown UO UO UO UO
D) milk turns sour UO UO
E) apples, when exposed to air, turn bro UO UO UO UO UO UO
wn Ans: A
UO U O
Category: Easy Section: 1.4 U O U O
11. All of the following are properties of sodium. Which one is a physical pro
UO UO UO UO UO UO UO U O UO UO UO UO UO
perty of sodium?
UO UO
A) It is a surface turns black when first exposed to air.
UO UO UO UO UO UO UO UO UO UO
B) It is a solid at 25 C and changes to a liquid when heated to 98 C.
UO UO UO UO UO UO UO UO UO UO UO UO UO UO
C) When placed in water it sizzles and a gas is formed.
UO UO UO UO UO UO UO UO UO UO
D) When placed in contact with chlorine it forms a compound that melts at 801 C.
UO UO UO UO UO UO UO UO UO UO UO UO UO
E) Sodium is never found as the pure metal in na
UO UO UO UO UO UO UO UO UO
ture. Ans: B
UO Category: Easy
U O U O
Section: 1.4 U O
12. All of the following are properties of tin. Which one is a chemical property of tin?
UO UO UO UO UO UO UO U O UO UO UO UO UO UO UO
A) Tin can be hammered into a thin sheet.
UO UO UO UO UO UO UO
B) At –40 C a sheet of tin crumbles to a gray powder.
UO UO UO UO UO UO UO UO UO UO
C) Tin melts at 231.9 C. UO UO UO
D) When a bar of tin is bent, it emits an audible “cry”.
UO UO UO UO UO UO UO UO UO UO UO
E) Tin erodes when added to hydrochloric acid, and a clear gas f
UO UO UO UO UO UO UO UO UO UO UO
orms. Ans: EUO Category: Medium
U O Section: 1.4 U O U O
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13. Which one of the following represents a chemical change?
UO UO UO UO UO UO UO UO
A) boiling water to form steam UO UO UO UO
B) burning a piece of coal UO UO UO UO
C) heating lead until it melts UO UO UO UO
D) mixing iron filings and sand at room temperature
UO UO UO UO UO UO UO
E) breaking glass UO
Ans: B Category: Medium Section: 1.4
U O U O U O
14. Which of the following does not represent a chemical change?
UO UO UO UO UO UO UO UO UO
A) a freshly cut apple turns brown
UO UO UO UO UO
B) milk turns sour on standing at room temperature
UO UO UO UO UO UO UO
C) when cooled to 0 C, liquid water becomes ice
UO UO UO UO UO UO UO
D) frying an egg UO UO
E) fermentation of sugar to alcohol UO UO UO UO UO
Ans: C Category: Easy
U O U O
Section: 1.4 UO
15. The SI prefixes nano and deci represent, respectively:
UO UO UO UO UO UO UO
A) 10– 9 and 10– UO UO D) 109 and 10– 6.
UO UO UO UO
6
.
UO
B) 106 and 10– 3. UO E)
UO 10– 9 and 10–
UO UO UO UO
1
. UO
C) 103 and 10– 3. UO UO UO
16. Ans: E Category: Easy Section: 1.7
U O U O
The SI prefixes milli and mega represent, respectively:
UO UO UO UO UO UO UO
A) 106 and 10– 6. UO D) 10– 3 and 109.
UO UO UO UO UO
B) 10– 3 and 106. UO UO E) UO10– 6 and 10– UO UO UO
3
. UO
C) 103 and 10– 6. UO UO UO
17.
Ans: B Category: Easy Section: 1.7
U O U O
The SI prefixes kilo and centi represent, respectively:
UO UO UO UO UO UO UO
A) 103 and 10– 2. UO UO D) 10– 6 and 102.
UO UO UO UO
–1
6
B) 10 and 10 . UO UO E) 102 and 10– 3.
UO UO UO UO
C) 10– 3 and 10– UO UO UO
18. A2. nanometer corresponds to:
UO UO UO
–2
meters. Easy Section: 1.7 D) 10– 9 meters.
UO
A)
Ans: 10 A– 3 Category:
U O
UO UO UO UO
B) 10 meters. UO UO E) 10– 12 meters. UO UO
–6
C) 10 meters. UO UO
Ans: D Category: Easy Section: 1.7
U O U O U O
19. A microliter corresponds to:
UO UO UO
A) 10– 2 liters. B) 10– 3 liters. C) 10– 6 liters.D) 10– 9 liters. E) 10–
UO UO U O UO UO U O UO UO U O UO UO UO
12
UO liters. Ans: C
UO UO Category: Easy U O Section: 1.7 U O U O
Page 3 UO
UO UO
1. A tentative explanation for a set of observations that can be tested by
UO UO UO UO UO UO UO UO UO UO UO UO UO
further experimentation is referred to as
UO UO UO UO UO
A) a hypothesis. B) a law.
UO C) a theory. U O UO U O UO
D) none of the above. Ans: A
U O UO Category: Easy
UO UO UO U O U O
Section: 1.2 U O
2. A concise verbal or mathematical statement of a relationship between phenomena
UO UO UO UO UO UO UO UO UO UO UO
that is always the same under the same conditions is referred to as
UO UO UO UO UO UO UO UO UO UO UO UO
A) a hypothesis. B) a law.
UO C) a theory. U O UO U O UO
D) none of the above. Ans: B
U O UO Category: Easy
UO UO UO U O U O
Section: 1.2 U O
3. A unifying principle that explains a body of facts and relations is referred to as
UO UO UO UO UO UO UO UO UO UO UO UO UO UO
A) a hypothesis. B) a law.
UO C) a theory. U O UO U O UO
D) none of the above. Ans: C
U O UO Category: Easy
UO UO UO U O U O
Section: 1.2 U O
4. Complete the following sentence. A hypothesis is
UO UO UO U O UO UO
A) a tentative explanation for a set of observations that can be tested by
UO UO UO UO UO UO UO UO UO UO UO UO UO
further experimentation. UO
B) a statement describing a relationship between phenomena that is always the
UO UO UO UO UO UO UO UO UO UO U
same under the same conditions.
O UO UO UO UO
C) a unifying principle that explains a body of facts and relations.
UO UO UO UO UO UO UO UO UO UO
D) a model used to visualize the invisi
UO UO UO UO UO UO
ble. Ans: A
UO U O
Category: Easy Section: 1.2 U O U O
5. Complete the following sentence. A scientific law is
UO UO UO U O UO UO UO
A) a tentative explanation for a set of observations that can be tested by
UO UO UO UO UO UO UO UO UO UO UO UO UO
further experimentation. UO
B) a statement describing a relationship between phenomena that is always the
UO UO UO UO UO UO UO UO UO UO U
same under the same conditions.
O UO UO UO UO
C) a unifying principle that explains a body of facts and relations.
UO UO UO UO UO UO UO UO UO UO
D) a model used to visualize the invisi
UO UO UO UO UO UO
ble. Ans: B
UO U O
Category: Easy Section: 1.2 U O U O
6. Complete the following sentence. A theory is
UO UO UO U O UO UO
A) a tentative explanation for a set of observations that can be tested by
UO UO UO UO UO UO UO UO UO UO UO UO UO
further experimentation. UO
B) a statement describing a relationship between phenomena that is always the
UO UO UO UO UO UO UO UO UO UO U
same under the same conditions.
O UO UO UO UO
C) a unifying principle that explains a body of facts and relations.
UO UO UO UO UO UO UO UO UO UO
D) a model used to visualize the invisi
UO UO UO UO UO UO
ble. Ans: C
UO U O
Category: Easy Section: 1.2 U O U O
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7. Choose the response that includes all the items listed below that are pure substances.
UO UO UO UO UO UO UO UO UO UO UO UO UO
i. orange juice ii. steam iii. ocean water iv. oxygen v. vegetable soup
UO UO UO UO UO UO UO UO
A) i, iii, v
U O UO B) ii, iv C) i, iii, iv D) iv only
UO U O UO U O UO UO U O UO
E) all of them are pure Ans: B U O Category: Easy
UO UO UO UO UO U O U O
Section: 1.2 U O
8. Which of the following is an example of a physical property?
UO UO UO UO UO UO UO UO UO UO
A) corrosiveness of sulfuric acid UO UO UO
B) toxicity of cyanide UO UO
C) flammability of gasoline UO UO
D) neutralization of stomach acid with an antacid UO UO UO UO UO UO
E) lead becomes a liquid when heated to 601
UO UO UO UO UO UO UO
C Ans: E
UO Category: Easy
U O U O
Section: 1.4 U O
9. Which one of the following is an example of a physical property?
UO UO UO UO UO UO UO UO UO UO UO
A) dynamite explodes D) ice floats on top of liquid water
UO UO UO UO UO UO UO
B) meat rots if it is not refrigerated
UO E) a silver platter tarnishes
UO UO UO UO UO UO UO UO
C) gasoline burns UO
Ans: D Category: Easy Section: 1.4
U O U O U O
10. Which one of the following represents a physical change?
UO UO UO UO UO UO UO UO
A) water, when heated to 100 C, forms steam
UO UO UO UO UO UO
B) bleach turns hair yellow UO UO UO
C) sugar, when heated, becomes brown UO UO UO UO
D) milk turns sour UO UO
E) apples, when exposed to air, turn bro UO UO UO UO UO UO
wn Ans: A
UO U O
Category: Easy Section: 1.4 U O U O
11. All of the following are properties of sodium. Which one is a physical pro
UO UO UO UO UO UO UO U O UO UO UO UO UO
perty of sodium?
UO UO
A) It is a surface turns black when first exposed to air.
UO UO UO UO UO UO UO UO UO UO
B) It is a solid at 25 C and changes to a liquid when heated to 98 C.
UO UO UO UO UO UO UO UO UO UO UO UO UO UO
C) When placed in water it sizzles and a gas is formed.
UO UO UO UO UO UO UO UO UO UO
D) When placed in contact with chlorine it forms a compound that melts at 801 C.
UO UO UO UO UO UO UO UO UO UO UO UO UO
E) Sodium is never found as the pure metal in na
UO UO UO UO UO UO UO UO UO
ture. Ans: B
UO Category: Easy
U O U O
Section: 1.4 U O
12. All of the following are properties of tin. Which one is a chemical property of tin?
UO UO UO UO UO UO UO U O UO UO UO UO UO UO UO
A) Tin can be hammered into a thin sheet.
UO UO UO UO UO UO UO
B) At –40 C a sheet of tin crumbles to a gray powder.
UO UO UO UO UO UO UO UO UO UO
C) Tin melts at 231.9 C. UO UO UO
D) When a bar of tin is bent, it emits an audible “cry”.
UO UO UO UO UO UO UO UO UO UO UO
E) Tin erodes when added to hydrochloric acid, and a clear gas f
UO UO UO UO UO UO UO UO UO UO UO
orms. Ans: EUO Category: Medium
U O Section: 1.4 U O U O
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13. Which one of the following represents a chemical change?
UO UO UO UO UO UO UO UO
A) boiling water to form steam UO UO UO UO
B) burning a piece of coal UO UO UO UO
C) heating lead until it melts UO UO UO UO
D) mixing iron filings and sand at room temperature
UO UO UO UO UO UO UO
E) breaking glass UO
Ans: B Category: Medium Section: 1.4
U O U O U O
14. Which of the following does not represent a chemical change?
UO UO UO UO UO UO UO UO UO
A) a freshly cut apple turns brown
UO UO UO UO UO
B) milk turns sour on standing at room temperature
UO UO UO UO UO UO UO
C) when cooled to 0 C, liquid water becomes ice
UO UO UO UO UO UO UO
D) frying an egg UO UO
E) fermentation of sugar to alcohol UO UO UO UO UO
Ans: C Category: Easy
U O U O
Section: 1.4 UO
15. The SI prefixes nano and deci represent, respectively:
UO UO UO UO UO UO UO
A) 10– 9 and 10– UO UO D) 109 and 10– 6.
UO UO UO UO
6
.
UO
B) 106 and 10– 3. UO E)
UO 10– 9 and 10–
UO UO UO UO
1
. UO
C) 103 and 10– 3. UO UO UO
16. Ans: E Category: Easy Section: 1.7
U O U O
The SI prefixes milli and mega represent, respectively:
UO UO UO UO UO UO UO
A) 106 and 10– 6. UO D) 10– 3 and 109.
UO UO UO UO UO
B) 10– 3 and 106. UO UO E) UO10– 6 and 10– UO UO UO
3
. UO
C) 103 and 10– 6. UO UO UO
17.
Ans: B Category: Easy Section: 1.7
U O U O
The SI prefixes kilo and centi represent, respectively:
UO UO UO UO UO UO UO
A) 103 and 10– 2. UO UO D) 10– 6 and 102.
UO UO UO UO
–1
6
B) 10 and 10 . UO UO E) 102 and 10– 3.
UO UO UO UO
C) 10– 3 and 10– UO UO UO
18. A2. nanometer corresponds to:
UO UO UO
–2
meters. Easy Section: 1.7 D) 10– 9 meters.
UO
A)
Ans: 10 A– 3 Category:
U O
UO UO UO UO
B) 10 meters. UO UO E) 10– 12 meters. UO UO
–6
C) 10 meters. UO UO
Ans: D Category: Easy Section: 1.7
U O U O U O
19. A microliter corresponds to:
UO UO UO
A) 10– 2 liters. B) 10– 3 liters. C) 10– 6 liters.D) 10– 9 liters. E) 10–
UO UO U O UO UO U O UO UO U O UO UO UO
12
UO liters. Ans: C
UO UO Category: Easy U O Section: 1.7 U O U O
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