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