,Chapter 01: Introduction
@2 @2
1. A tentative explanation for a set of observations that can be tested by
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further experimentation is referred to as
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A) a hypothesis. B) a law.
@2 C) a theory. @ 2 @2 @ 2 @2
D) none of the above. Ans: A
@ 2 @2Category: Easy
@2 @2 @2 @ 2 @ 2
Section: 1.2 @ 2
2. A concise verbal or mathematical statement of a relationship between phenomena t
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hat is always the same under the same conditions is referred to as
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A) a hypothesis. B) a law.
@2 C) a theory. @ 2 @2 @ 2 @2
D) none of the above. Ans: B
@ 2 Category: Easy
@2 @2 @2 @2 @ 2 @ 2
Section: 1.2 @ 2
3. A unifying principle that explains a body of facts and relations is referred to as
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A) a hypothesis. B) a law.
@2 C) a theory. @ 2 @2 @ 2 @2
D) none of the above. Ans: C
@ 2 Category: Easy
@2 @2 @2 @2 @ 2 @ 2
Section: 1.2 @ 2
4. Complete the following sentence. A hypothesis is
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A) a tentative explanation for a set of observations that can be tested by
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further experimentation. @2
B) a statement describing a relationship between phenomena that is always the
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same under the same conditions.
2 @2 @2 @2 @2
C) a unifying principle that explains a body of facts and relations.
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D) a model used to visualize the invisib
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le. Ans: A
@2 @ 2
Category: Easy Section: 1.2 @ 2 @ 2
5. Complete the following sentence. A scientific law is
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A) a tentative explanation for a set of observations that can be tested by
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further experimentation. @2
B) a statement describing a relationship between phenomena that is always the
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same under the same conditions.
2 @2 @2 @2 @2
C) a unifying principle that explains a body of facts and relations.
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D) a model used to visualize the invisib
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le. Ans: B
@2 @ 2
Category: Easy Section: 1.2 @ 2 @ 2
6. Complete the following sentence. A theory is
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A) a tentative explanation for a set of observations that can be tested by
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further experimentation. @2
B) a statement describing a relationship between phenomena that is always the
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same under the same conditions.
2 @2 @2 @2 @2
C) a unifying principle that explains a body of facts and relations.
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D) a model used to visualize the invisib
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le. Ans: C
@2 @ 2
Category: Easy Section: 1.2 @ 2 @ 2
Page 1 @2
, Chapter 01: Introductio @2 @2
n
7. Choose the response that includes all the items listed below that are pure substances.
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2
i. orange juice ii. steam iii. ocean water iv. oxygen v. vegetable soup
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A) i, iii, v
@ 2 @2 B) ii, iv
@2 C) i, iii, iv D) iv only @ 2 @2 @ 2 @2 @2 @ 2 @2
E) all of them are pure Ans: B @ 2 Category: Easy
@2 @2 @2 @2 @2 @ 2 @ 2
Section: 1.2 @ 2
8. Which of the following is an example of a physical property?
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2
A) corrosiveness of sulfuric acid @2 @2 @2
B) toxicity of cyanide @2 @2
C) flammability of gasoline @2 @2
D) neutralization of stomach acid with an antacid @2 @2 @2 @2 @2 @2
E) lead becomes a liquid when heated to 601
@2 @2 @2 @2 @2 @2 @2
C Ans: E
@2 Category: Easy
@ 2 @ 2
Section: 1.4 @ 2
9. Which one of the following is an example of a physical property?
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2
A) dynamite explodes D) ice floats on top of liquid water
@2 @2 @2 @2 @2 @2 @2
B) meat rots if it is not refrigerated
@2 E) a silver platter tarnishes
@2 @2 @2 @2 @2 @2 @2 @2
C) gasoline burns @2
Ans: D Category: Easy Section: 1.4
@ 2 @ 2 @ 2
10. Which one of the following represents a physical change?
@2 @2 @2 @2 @2 @2 @2 @2
A) water, when heated to 100 C, forms steam
@2 @2 @2 @2 @2 @2
B) bleach turns hair yellow @2 @2 @2
C) sugar, when heated, becomes brown @2 @2 @2 @2
D) milk turns sour @2 @2
E) apples, when exposed to air, turn bro @2 @2 @2 @2 @2 @2
wn Ans: A
@2 @ 2
Category: Easy Section: 1.4 @ 2 @ 2
11. All of the following are properties of sodium. Which one is a physical pro
@2 @2 @2 @2 @2 @2 @2 @ 2 @2 @2 @2 @2 @2
perty of sodium?
@2 @2
A) It is a surface turns black when first exposed to air.
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B) It is a solid at 25 C and changes to a liquid when heated to 98 C.
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C) When placed in water it sizzles and a gas is formed.
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D) When placed in contact with chlorine it forms a compound that melts at 801 C.
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E) Sodium is never found as the pure metal in na
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ture. Ans: B
@2 Category: Easy
@ 2 @ 2
Section: 1.4 @ 2
12. All of the following are properties of tin. Which one is a chemical property of tin?
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A) Tin can be hammered into a thin sheet.
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B) At –40 C a sheet of tin crumbles to a gray powder.
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2
C) Tin melts at 231.9 C. @2 @2 @2
D) When a bar of tin is bent, it emits an audible ―cry‖.
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2
E) Tin erodes when added to hydrochloric acid, and a clear gas f
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2
orms. Ans: E@2 Category: Medium
@ 2 Section: 1.4 @ 2 @ 2
Page 2 @2
, Chapter 01: Introductio @2 @2
n
13. Which one of the following represents a chemical change?
@2 @2 @2 @2 @2 @2 @2 @2
A) boiling water to form steam @2 @2 @2 @2
B) burning a piece of coal @2 @2 @2 @2
C) heating lead until it melts @2 @2 @2 @2
D) mixing iron filings and sand at room temperature
@2 @2 @2 @2 @2 @2 @2
E) breaking glass @2
Ans: B Category: Medium Section: 1.4
@ 2 @ 2 @ 2
14. Which of the following does not represent a chemical change?
@2 @2 @2 @2 @2 @2 @2 @2 @2
A) a freshly cut apple turns brown
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B) milk turns sour on standing at room temperature
@2 @2 @2 @2 @2 @2 @2
C) when cooled to 0 C, liquid water becomes ice
@2 @2 @2 @2 @2 @2 @2
D) frying an egg @2 @2
E) fermentation of sugar to alcohol @2 @2 @2 @2 @2
Ans: C Category: Easy
@ 2 @ 2
Section: 1.4 @2
15. The SI prefixes nano and deci represent, respectively:
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A) 10– 9 and 10– @2 @2 D) 109 and 10– 6.
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6
.
@2
B) 106 and 10– 3. @2 E)
@2 10– 9 and 10–
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1
. @2
C) 103 and 10– 3. @2 @2 @2
16. Ans: E Category: Easy Section: 1.7
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The SI prefixes milli and mega represent, respectively:
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A) 106 and 10– 6. @2 @2D) 10– 3 and 109.
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B) 10– 3 and 106. @2 @2 E) @210– 6 and 10– @2 @2 @2
3
. @2
C) 103 and 10– 6. @2 @2 @2
17.
Ans: B Category: Easy Section: 1.7
@ 2 @ 2
The SI prefixes kilo and centi represent, respectively:
@2 @2 @2 @2 @2 @2 @2
A) 103 and 10– 2. @2 @2 D) 10– 6 and 102.
@2 @2 @2 @2
–1
6
B) 10 and 10 . @2 @2 E) 102 and 10– 3.
@2 @2 @2 @2
C) 10– 3 and 10– @2 @2 @2
18. A2 nanometer corresponds to:
@2 @2 @2
. –2
meters. Easy Section: 1.7 D) 10– 9 meters.
@2
A)
Ans: 10A– 3 Category: @2 @2 @2 @2
10– 12 meters.
@ 2
B) 10 meters. @2 @2 E) @2 @2
C) 10– 6 meters. @2 @2
Ans: D Category: Easy Section: 1.7
@ 2 @ 2 @ 2
19. A microliter corresponds to:
@2 @2 @2
A) 10– 2 liters. B) 10– 3 liters. C) 10– 6 liters. D) 10– 9 liters. E) 10–
@2 @2 @ 2 @2 @2 @ 2 @2 @2 @ 2 @2 @2 @2
12
@2 liters. Ans: C
@2 @2 Category: Easy @ 2 Section: 1.7 @ 2 @ 2
Page 3 @2
@2 @2
1. A tentative explanation for a set of observations that can be tested by
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2
further experimentation is referred to as
@2 @2 @2 @2 @2
A) a hypothesis. B) a law.
@2 C) a theory. @ 2 @2 @ 2 @2
D) none of the above. Ans: A
@ 2 @2Category: Easy
@2 @2 @2 @ 2 @ 2
Section: 1.2 @ 2
2. A concise verbal or mathematical statement of a relationship between phenomena t
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2
hat is always the same under the same conditions is referred to as
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2
A) a hypothesis. B) a law.
@2 C) a theory. @ 2 @2 @ 2 @2
D) none of the above. Ans: B
@ 2 Category: Easy
@2 @2 @2 @2 @ 2 @ 2
Section: 1.2 @ 2
3. A unifying principle that explains a body of facts and relations is referred to as
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2
A) a hypothesis. B) a law.
@2 C) a theory. @ 2 @2 @ 2 @2
D) none of the above. Ans: C
@ 2 Category: Easy
@2 @2 @2 @2 @ 2 @ 2
Section: 1.2 @ 2
4. Complete the following sentence. A hypothesis is
@2 @2 @2 @ 2 @2 @2
A) a tentative explanation for a set of observations that can be tested by
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2
further experimentation. @2
B) a statement describing a relationship between phenomena that is always the
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same under the same conditions.
2 @2 @2 @2 @2
C) a unifying principle that explains a body of facts and relations.
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2
D) a model used to visualize the invisib
@2 @2 @2 @2 @2 @2
le. Ans: A
@2 @ 2
Category: Easy Section: 1.2 @ 2 @ 2
5. Complete the following sentence. A scientific law is
@2 @2 @2 @ 2 @2 @2 @2
A) a tentative explanation for a set of observations that can be tested by
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2
further experimentation. @2
B) a statement describing a relationship between phenomena that is always the
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @
same under the same conditions.
2 @2 @2 @2 @2
C) a unifying principle that explains a body of facts and relations.
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2
D) a model used to visualize the invisib
@2 @2 @2 @2 @2 @2
le. Ans: B
@2 @ 2
Category: Easy Section: 1.2 @ 2 @ 2
6. Complete the following sentence. A theory is
@2 @2 @2 @ 2 @2 @2
A) a tentative explanation for a set of observations that can be tested by
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2
further experimentation. @2
B) a statement describing a relationship between phenomena that is always the
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @
same under the same conditions.
2 @2 @2 @2 @2
C) a unifying principle that explains a body of facts and relations.
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2
D) a model used to visualize the invisib
@2 @2 @2 @2 @2 @2
le. Ans: C
@2 @ 2
Category: Easy Section: 1.2 @ 2 @ 2
Page 1 @2
, Chapter 01: Introductio @2 @2
n
7. Choose the response that includes all the items listed below that are pure substances.
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2
i. orange juice ii. steam iii. ocean water iv. oxygen v. vegetable soup
@2 @2 @2 @2 @2 @2 @2 @2
A) i, iii, v
@ 2 @2 B) ii, iv
@2 C) i, iii, iv D) iv only @ 2 @2 @ 2 @2 @2 @ 2 @2
E) all of them are pure Ans: B @ 2 Category: Easy
@2 @2 @2 @2 @2 @ 2 @ 2
Section: 1.2 @ 2
8. Which of the following is an example of a physical property?
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2
A) corrosiveness of sulfuric acid @2 @2 @2
B) toxicity of cyanide @2 @2
C) flammability of gasoline @2 @2
D) neutralization of stomach acid with an antacid @2 @2 @2 @2 @2 @2
E) lead becomes a liquid when heated to 601
@2 @2 @2 @2 @2 @2 @2
C Ans: E
@2 Category: Easy
@ 2 @ 2
Section: 1.4 @ 2
9. Which one of the following is an example of a physical property?
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2
A) dynamite explodes D) ice floats on top of liquid water
@2 @2 @2 @2 @2 @2 @2
B) meat rots if it is not refrigerated
@2 E) a silver platter tarnishes
@2 @2 @2 @2 @2 @2 @2 @2
C) gasoline burns @2
Ans: D Category: Easy Section: 1.4
@ 2 @ 2 @ 2
10. Which one of the following represents a physical change?
@2 @2 @2 @2 @2 @2 @2 @2
A) water, when heated to 100 C, forms steam
@2 @2 @2 @2 @2 @2
B) bleach turns hair yellow @2 @2 @2
C) sugar, when heated, becomes brown @2 @2 @2 @2
D) milk turns sour @2 @2
E) apples, when exposed to air, turn bro @2 @2 @2 @2 @2 @2
wn Ans: A
@2 @ 2
Category: Easy Section: 1.4 @ 2 @ 2
11. All of the following are properties of sodium. Which one is a physical pro
@2 @2 @2 @2 @2 @2 @2 @ 2 @2 @2 @2 @2 @2
perty of sodium?
@2 @2
A) It is a surface turns black when first exposed to air.
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2
B) It is a solid at 25 C and changes to a liquid when heated to 98 C.
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2
C) When placed in water it sizzles and a gas is formed.
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2
D) When placed in contact with chlorine it forms a compound that melts at 801 C.
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2
E) Sodium is never found as the pure metal in na
@2 @2 @2 @2 @2 @2 @2 @2 @2
ture. Ans: B
@2 Category: Easy
@ 2 @ 2
Section: 1.4 @ 2
12. All of the following are properties of tin. Which one is a chemical property of tin?
@2 @2 @2 @2 @2 @2 @2 @ 2 @2 @2 @2 @2 @2 @2 @2
A) Tin can be hammered into a thin sheet.
@2 @2 @2 @2 @2 @2 @2
B) At –40 C a sheet of tin crumbles to a gray powder.
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2
C) Tin melts at 231.9 C. @2 @2 @2
D) When a bar of tin is bent, it emits an audible ―cry‖.
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2
E) Tin erodes when added to hydrochloric acid, and a clear gas f
@2 @2 @2 @2 @2 @2 @2 @2 @2 @2 @2
orms. Ans: E@2 Category: Medium
@ 2 Section: 1.4 @ 2 @ 2
Page 2 @2
, Chapter 01: Introductio @2 @2
n
13. Which one of the following represents a chemical change?
@2 @2 @2 @2 @2 @2 @2 @2
A) boiling water to form steam @2 @2 @2 @2
B) burning a piece of coal @2 @2 @2 @2
C) heating lead until it melts @2 @2 @2 @2
D) mixing iron filings and sand at room temperature
@2 @2 @2 @2 @2 @2 @2
E) breaking glass @2
Ans: B Category: Medium Section: 1.4
@ 2 @ 2 @ 2
14. Which of the following does not represent a chemical change?
@2 @2 @2 @2 @2 @2 @2 @2 @2
A) a freshly cut apple turns brown
@2 @2 @2 @2 @2
B) milk turns sour on standing at room temperature
@2 @2 @2 @2 @2 @2 @2
C) when cooled to 0 C, liquid water becomes ice
@2 @2 @2 @2 @2 @2 @2
D) frying an egg @2 @2
E) fermentation of sugar to alcohol @2 @2 @2 @2 @2
Ans: C Category: Easy
@ 2 @ 2
Section: 1.4 @2
15. The SI prefixes nano and deci represent, respectively:
@2 @2 @2 @2 @2 @2 @2
A) 10– 9 and 10– @2 @2 D) 109 and 10– 6.
@2 @2 @2 @2
6
.
@2
B) 106 and 10– 3. @2 E)
@2 10– 9 and 10–
@2 @2 @2 @2
1
. @2
C) 103 and 10– 3. @2 @2 @2
16. Ans: E Category: Easy Section: 1.7
@ 2 @ 2
The SI prefixes milli and mega represent, respectively:
@2 @2 @2 @2 @2 @2 @2
A) 106 and 10– 6. @2 @2D) 10– 3 and 109.
@2 @2 @2 @2
B) 10– 3 and 106. @2 @2 E) @210– 6 and 10– @2 @2 @2
3
. @2
C) 103 and 10– 6. @2 @2 @2
17.
Ans: B Category: Easy Section: 1.7
@ 2 @ 2
The SI prefixes kilo and centi represent, respectively:
@2 @2 @2 @2 @2 @2 @2
A) 103 and 10– 2. @2 @2 D) 10– 6 and 102.
@2 @2 @2 @2
–1
6
B) 10 and 10 . @2 @2 E) 102 and 10– 3.
@2 @2 @2 @2
C) 10– 3 and 10– @2 @2 @2
18. A2 nanometer corresponds to:
@2 @2 @2
. –2
meters. Easy Section: 1.7 D) 10– 9 meters.
@2
A)
Ans: 10A– 3 Category: @2 @2 @2 @2
10– 12 meters.
@ 2
B) 10 meters. @2 @2 E) @2 @2
C) 10– 6 meters. @2 @2
Ans: D Category: Easy Section: 1.7
@ 2 @ 2 @ 2
19. A microliter corresponds to:
@2 @2 @2
A) 10– 2 liters. B) 10– 3 liters. C) 10– 6 liters. D) 10– 9 liters. E) 10–
@2 @2 @ 2 @2 @2 @ 2 @2 @2 @ 2 @2 @2 @2
12
@2 liters. Ans: C
@2 @2 Category: Easy @ 2 Section: 1.7 @ 2 @ 2
Page 3 @2
