,Chapter 01: Introduction
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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.
@4 C) a theory. @ 4 @4 @ 4 @4
D) none of the above. Ans: A
@ 4 @4Category: Easy
@4 @4 @4 @ 4 @ 4
Section: 1.2 @ 4
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.
@4 C) a theory. @ 4 @4 @ 4 @4
D) none of the above. Ans: B
@ 4 Category: Easy
@4 @4 @4 @4 @ 4 @ 4
Section: 1.2 @ 4
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.
@4 C) a theory. @ 4 @4 @ 4 @4
D) none of the above. Ans: C
@ 4 Category: Easy
@4 @4 @4 @4 @ 4 @ 4
Section: 1.2 @ 4
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. @4
B) a statement describing a relationship between phenomena that is always the
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same under the same conditions.
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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
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Category: Easy Section: 1.2 @ 4 @ 4
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. @4
B) a statement describing a relationship between phenomena that is always the
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same under the same conditions.
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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
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Category: Easy Section: 1.2 @ 4 @ 4
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. @4
B) a statement describing a relationship between phenomena that is always the
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same under the same conditions.
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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
@4 @ 4
Category: Easy Section: 1.2 @ 4 @ 4
Page 1 @4
, Chapter 01: Introductio @4 @4
n
7. Choose the response that includes all the items listed below that are pure substances.
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4
i. orange juice ii. steam iii. ocean water iv. oxygen v. vegetable soup
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A) i, iii, v
@ 4 @4 B) ii, iv
@4 C) i, iii, iv D) iv only @ 4 @4 @ 4 @4 @4 @ 4 @4
E) all of them are pure Ans: B @ 4 Category: Easy
@4 @4 @4 @4 @4 @ 4 @ 4
Section: 1.2 @ 4
8. Which of the following is an example of a physical property?
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4
A) corrosiveness of sulfuric acid @4 @4 @4
B) toxicity of cyanide @4 @4
C) flammability of gasoline @4 @4
D) neutralization of stomach acid with an antacid @4 @4 @4 @4 @4 @4
E) lead becomes a liquid when heated to 601
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C Ans: E
@4 Category: Easy
@ 4 @ 4
Section: 1.4 @ 4
9. Which one of the following is an example of a physical property?
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A) dynamite explodes D) ice floats on top of liquid water
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B) meat rots if it is not refrigerated
@4 E) a silver platter tarnishes
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C) gasoline burns @4
Ans: D Category: Easy Section: 1.4
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10. Which one of the following represents a physical change?
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A) water, when heated to 100 C, forms steam
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B) bleach turns hair yellow @4 @4 @4
C) sugar, when heated, becomes brown @4 @4 @4 @4
D) milk turns sour @4 @4
E) apples, when exposed to air, turn bro @4 @4 @4 @4 @4 @4
wn Ans: A
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Category: Easy Section: 1.4 @ 4 @ 4
11. All of the following are properties of sodium. Which one is a physical pro
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perty of sodium?
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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
@4 Category: Easy
@ 4 @ 4
Section: 1.4 @ 4
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.
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C) Tin melts at 231.9 C. @4 @4 @4
D) When a bar of tin is bent, it emits an audible ―cry‖.
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E) Tin erodes when added to hydrochloric acid, and a clear gas f
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orms. Ans: E@4 Category: Medium
@ 4 Section: 1.4 @ 4 @ 4
Page 2 @4
, Chapter 01: Introductio @4 @4
n
13. Which one of the following represents a chemical change?
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A) boiling water to form steam @4 @4 @4 @4
B) burning a piece of coal @4 @4 @4 @4
C) heating lead until it melts @4 @4 @4 @4
D) mixing iron filings and sand at room temperature
@4 @4 @4 @4 @4 @4 @4
E) breaking glass @4
Ans: B Category: Medium Section: 1.4
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14. Which of the following does not represent a chemical change?
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A) a freshly cut apple turns brown
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B) milk turns sour on standing at room temperature
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C) when cooled to 0 C, liquid water becomes ice
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D) frying an egg @4 @4
E) fermentation of sugar to alcohol @4 @4 @4 @4 @4
Ans: C Category: Easy
@ 4 @ 4
Section: 1.4 @4
15. The SI prefixes nano and deci represent, respectively:
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A) 10– 9 and 10– @4 @4 D) 109 and 10– 6.
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6
.
@4
B) 106 and 10– 3. @4 E)
@4 10– 9 and 10–
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1
. @4
C) 103 and 10– 3. @4 @4 @4
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. @4 @4D) 10– 3 and 109.
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B) 10– 3 and 106. @4 @4 E) @410– 6 and 10– @4 @4 @4
3
. @4
C) 103 and 10– 6. @4 @4 @4
17.
Ans: B Category: Easy Section: 1.7
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The SI prefixes kilo and centi represent, respectively:
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A) 103 and 10– 2. @4 @4 D) 10– 6 and 102.
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–1
6
B) 10 and 10 . @4 @4 E) 102 and 10– 3.
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C) 10– 3 and 10– @4 @4 @4
18. A2 nanometer corresponds to:
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. –2
meters. Easy Section: 1.7 D) 10– 9 meters.
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A)
Ans: 10A– 3 Category: @4 @4 @4 @4
10– 12 meters.
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B) 10 meters. @4 @4 E) @4 @4
C) 10– 6 meters. @4 @4
Ans: D Category: Easy Section: 1.7
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19. A microliter corresponds to:
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A) 10– 2 liters. B) 10– 3 liters. C) 10– 6 liters. D) 10– 9 liters. E) 10–
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12
@4 liters. Ans: C
@4 @4 Category: Easy @ 4 Section: 1.7 @ 4 @ 4
Page 3 @4
@4 @4
1. A tentative explanation for a set of observations that can be tested by
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4
further experimentation is referred to as
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A) a hypothesis. B) a law.
@4 C) a theory. @ 4 @4 @ 4 @4
D) none of the above. Ans: A
@ 4 @4Category: Easy
@4 @4 @4 @ 4 @ 4
Section: 1.2 @ 4
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
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4
A) a hypothesis. B) a law.
@4 C) a theory. @ 4 @4 @ 4 @4
D) none of the above. Ans: B
@ 4 Category: Easy
@4 @4 @4 @4 @ 4 @ 4
Section: 1.2 @ 4
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.
@4 C) a theory. @ 4 @4 @ 4 @4
D) none of the above. Ans: C
@ 4 Category: Easy
@4 @4 @4 @4 @ 4 @ 4
Section: 1.2 @ 4
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. @4
B) a statement describing a relationship between phenomena that is always the
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same under the same conditions.
4 @4 @4 @4 @4
C) a unifying principle that explains a body of facts and relations.
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4
D) a model used to visualize the invisib
@4 @4 @4 @4 @4 @4
le. Ans: A
@4 @ 4
Category: Easy Section: 1.2 @ 4 @ 4
5. Complete the following sentence. A scientific law is
@4 @4 @4 @ 4 @4 @4 @4
A) a tentative explanation for a set of observations that can be tested by
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4
further experimentation. @4
B) a statement describing a relationship between phenomena that is always the
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same under the same conditions.
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C) a unifying principle that explains a body of facts and relations.
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D) a model used to visualize the invisib
@4 @4 @4 @4 @4 @4
le. Ans: B
@4 @ 4
Category: Easy Section: 1.2 @ 4 @ 4
6. Complete the following sentence. A theory is
@4 @4 @4 @ 4 @4 @4
A) a tentative explanation for a set of observations that can be tested by
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4
further experimentation. @4
B) a statement describing a relationship between phenomena that is always the
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same under the same conditions.
4 @4 @4 @4 @4
C) a unifying principle that explains a body of facts and relations.
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4
D) a model used to visualize the invisib
@4 @4 @4 @4 @4 @4
le. Ans: C
@4 @ 4
Category: Easy Section: 1.2 @ 4 @ 4
Page 1 @4
, Chapter 01: Introductio @4 @4
n
7. Choose the response that includes all the items listed below that are pure substances.
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4
i. orange juice ii. steam iii. ocean water iv. oxygen v. vegetable soup
@4 @4 @4 @4 @4 @4 @4 @4
A) i, iii, v
@ 4 @4 B) ii, iv
@4 C) i, iii, iv D) iv only @ 4 @4 @ 4 @4 @4 @ 4 @4
E) all of them are pure Ans: B @ 4 Category: Easy
@4 @4 @4 @4 @4 @ 4 @ 4
Section: 1.2 @ 4
8. Which of the following is an example of a physical property?
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4
A) corrosiveness of sulfuric acid @4 @4 @4
B) toxicity of cyanide @4 @4
C) flammability of gasoline @4 @4
D) neutralization of stomach acid with an antacid @4 @4 @4 @4 @4 @4
E) lead becomes a liquid when heated to 601
@4 @4 @4 @4 @4 @4 @4
C Ans: E
@4 Category: Easy
@ 4 @ 4
Section: 1.4 @ 4
9. Which one of the following is an example of a physical property?
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4
A) dynamite explodes D) ice floats on top of liquid water
@4 @4 @4 @4 @4 @4 @4
B) meat rots if it is not refrigerated
@4 E) a silver platter tarnishes
@4 @4 @4 @4 @4 @4 @4 @4
C) gasoline burns @4
Ans: D Category: Easy Section: 1.4
@ 4 @ 4 @ 4
10. Which one of the following represents a physical change?
@4 @4 @4 @4 @4 @4 @4 @4
A) water, when heated to 100 C, forms steam
@4 @4 @4 @4 @4 @4
B) bleach turns hair yellow @4 @4 @4
C) sugar, when heated, becomes brown @4 @4 @4 @4
D) milk turns sour @4 @4
E) apples, when exposed to air, turn bro @4 @4 @4 @4 @4 @4
wn Ans: A
@4 @ 4
Category: Easy Section: 1.4 @ 4 @ 4
11. All of the following are properties of sodium. Which one is a physical pro
@4 @4 @4 @4 @4 @4 @4 @ 4 @4 @4 @4 @4 @4
perty of sodium?
@4 @4
A) It is a surface turns black when first exposed to air.
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4
B) It is a solid at 25 C and changes to a liquid when heated to 98 C.
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4
C) When placed in water it sizzles and a gas is formed.
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4
D) When placed in contact with chlorine it forms a compound that melts at 801 C.
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4
E) Sodium is never found as the pure metal in na
@4 @4 @4 @4 @4 @4 @4 @4 @4
ture. Ans: B
@4 Category: Easy
@ 4 @ 4
Section: 1.4 @ 4
12. All of the following are properties of tin. Which one is a chemical property of tin?
@4 @4 @4 @4 @4 @4 @4 @ 4 @4 @4 @4 @4 @4 @4 @4
A) Tin can be hammered into a thin sheet.
@4 @4 @4 @4 @4 @4 @4
B) At –40 C a sheet of tin crumbles to a gray powder.
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4
C) Tin melts at 231.9 C. @4 @4 @4
D) When a bar of tin is bent, it emits an audible ―cry‖.
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4
E) Tin erodes when added to hydrochloric acid, and a clear gas f
@4 @4 @4 @4 @4 @4 @4 @4 @4 @4 @4
orms. Ans: E@4 Category: Medium
@ 4 Section: 1.4 @ 4 @ 4
Page 2 @4
, Chapter 01: Introductio @4 @4
n
13. Which one of the following represents a chemical change?
@4 @4 @4 @4 @4 @4 @4 @4
A) boiling water to form steam @4 @4 @4 @4
B) burning a piece of coal @4 @4 @4 @4
C) heating lead until it melts @4 @4 @4 @4
D) mixing iron filings and sand at room temperature
@4 @4 @4 @4 @4 @4 @4
E) breaking glass @4
Ans: B Category: Medium Section: 1.4
@ 4 @ 4 @ 4
14. Which of the following does not represent a chemical change?
@4 @4 @4 @4 @4 @4 @4 @4 @4
A) a freshly cut apple turns brown
@4 @4 @4 @4 @4
B) milk turns sour on standing at room temperature
@4 @4 @4 @4 @4 @4 @4
C) when cooled to 0 C, liquid water becomes ice
@4 @4 @4 @4 @4 @4 @4
D) frying an egg @4 @4
E) fermentation of sugar to alcohol @4 @4 @4 @4 @4
Ans: C Category: Easy
@ 4 @ 4
Section: 1.4 @4
15. The SI prefixes nano and deci represent, respectively:
@4 @4 @4 @4 @4 @4 @4
A) 10– 9 and 10– @4 @4 D) 109 and 10– 6.
@4 @4 @4 @4
6
.
@4
B) 106 and 10– 3. @4 E)
@4 10– 9 and 10–
@4 @4 @4 @4
1
. @4
C) 103 and 10– 3. @4 @4 @4
16. Ans: E Category: Easy Section: 1.7
@ 4 @ 4
The SI prefixes milli and mega represent, respectively:
@4 @4 @4 @4 @4 @4 @4
A) 106 and 10– 6. @4 @4D) 10– 3 and 109.
@4 @4 @4 @4
B) 10– 3 and 106. @4 @4 E) @410– 6 and 10– @4 @4 @4
3
. @4
C) 103 and 10– 6. @4 @4 @4
17.
Ans: B Category: Easy Section: 1.7
@ 4 @ 4
The SI prefixes kilo and centi represent, respectively:
@4 @4 @4 @4 @4 @4 @4
A) 103 and 10– 2. @4 @4 D) 10– 6 and 102.
@4 @4 @4 @4
–1
6
B) 10 and 10 . @4 @4 E) 102 and 10– 3.
@4 @4 @4 @4
C) 10– 3 and 10– @4 @4 @4
18. A2 nanometer corresponds to:
@4 @4 @4
. –2
meters. Easy Section: 1.7 D) 10– 9 meters.
@4
A)
Ans: 10A– 3 Category: @4 @4 @4 @4
10– 12 meters.
@ 4
B) 10 meters. @4 @4 E) @4 @4
C) 10– 6 meters. @4 @4
Ans: D Category: Easy Section: 1.7
@ 4 @ 4 @ 4
19. A microliter corresponds to:
@4 @4 @4
A) 10– 2 liters. B) 10– 3 liters. C) 10– 6 liters. D) 10– 9 liters. E) 10–
@4 @4 @ 4 @4 @4 @ 4 @4 @4 @ 4 @4 @4 @4
12
@4 liters. Ans: C
@4 @4 Category: Easy @ 4 Section: 1.7 @ 4 @ 4
Page 3 @4
