,Chapter 01: Introduction
@3 @3
1. A tentative explanation for a set of observations that can be tested by
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
further experimentation is referred to as
@3 @3 @3 @3 @3
A) a hypothesis. B) a law.
@3 C) a theory. @ 3 @3 @ 3 @3
D) none of the above. Ans: A
@ 3 @3Category: Easy
@3 @3 @3 @ 3 @ 3
Section: 1.2 @ 3
2. A concise verbal or mathematical statement of a relationship between phenomena t
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
hat is always the same under the same conditions is referred to as
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
A) a hypothesis. B) a law.
@3 C) a theory. @ 3 @3 @ 3 @3
D) none of the above. Ans: B
@ 3 Category: Easy
@3 @3 @3 @3 @ 3 @ 3
Section: 1.2 @ 3
3. A unifying principle that explains a body of facts and relations is referred to as
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
A) a hypothesis. B) a law.
@3 C) a theory. @ 3 @3 @ 3 @3
D) none of the above. Ans: C
@ 3 Category: Easy
@3 @3 @3 @3 @ 3 @ 3
Section: 1.2 @ 3
4. Complete the following sentence. A hypothesis is
@3 @3 @3 @ 3 @3 @3
A) a tentative explanation for a set of observations that can be tested by
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
further experimentation. @3
B) a statement describing a relationship between phenomena that is always the
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @
same under the same conditions.
3 @3 @3 @3 @3
C) a unifying principle that explains a body of facts and relations.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3
D) a model used to visualize the invisib
@3 @3 @3 @3 @3 @3
le. Ans: A
@3 @ 3
Category: Easy Section: 1.2 @ 3 @ 3
5. Complete the following sentence. A scientific law is
@3 @3 @3 @ 3 @3 @3 @3
A) a tentative explanation for a set of observations that can be tested by
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
further experimentation. @3
B) a statement describing a relationship between phenomena that is always the
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @
same under the same conditions.
3 @3 @3 @3 @3
C) a unifying principle that explains a body of facts and relations.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3
D) a model used to visualize the invisib
@3 @3 @3 @3 @3 @3
le. Ans: B
@3 @ 3
Category: Easy Section: 1.2 @ 3 @ 3
6. Complete the following sentence. A theory is
@3 @3 @3 @ 3 @3 @3
A) a tentative explanation for a set of observations that can be tested by
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
further experimentation. @3
B) a statement describing a relationship between phenomena that is always the
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @
same under the same conditions.
3 @3 @3 @3 @3
C) a unifying principle that explains a body of facts and relations.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3
D) a model used to visualize the invisib
@3 @3 @3 @3 @3 @3
le. Ans: C
@3 @ 3
Category: Easy Section: 1.2 @ 3 @ 3
Page 1 @3
, Chapter 01: Introductio @3 @3
n
7. Choose the response that includes all the items listed below that are pure substances.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
i. orange juice ii. steam iii. ocean water iv. oxygen v. vegetable soup
@3 @3 @3 @3 @3 @3 @3 @3
A) i, iii, v
@ 3 @3 B) ii, iv
@3 C) i, iii, iv D) iv only @ 3 @3 @ 3 @3 @3 @ 3 @3
E) all of them are pure Ans: B @ 3 Category: Easy
@3 @3 @3 @3 @3 @ 3 @ 3
Section: 1.2 @ 3
8. Which of the following is an example of a physical property?
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3
A) corrosiveness of sulfuric acid @3 @3 @3
B) toxicity of cyanide @3 @3
C) flammability of gasoline @3 @3
D) neutralization of stomach acid with an antacid @3 @3 @3 @3 @3 @3
E) lead becomes a liquid when heated to 601
@3 @3 @3 @3 @3 @3 @3
C Ans: E
@3 Category: Easy
@ 3 @ 3
Section: 1.4 @ 3
9. Which one of the following is an example of a physical property?
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
A) dynamite explodes D) ice floats on top of liquid water
@3 @3 @3 @3 @3 @3 @3
B) meat rots if it is not refrigerated
@3 E) a silver platter tarnishes
@3 @3 @3 @3 @3 @3 @3 @3
C) gasoline burns @3
Ans: D Category: Easy Section: 1.4
@ 3 @ 3 @ 3
10. Which one of the following represents a physical change?
@3 @3 @3 @3 @3 @3 @3 @3
A) water, when heated to 100 C, forms steam
@3 @3 @3 @3 @3 @3
B) bleach turns hair yellow @3 @3 @3
C) sugar, when heated, becomes brown @3 @3 @3 @3
D) milk turns sour @3 @3
E) apples, when exposed to air, turn bro @3 @3 @3 @3 @3 @3
wn Ans: A
@3 @ 3
Category: Easy Section: 1.4 @ 3 @ 3
11. All of the following are properties of sodium. Which one is a physical pro
@3 @3 @3 @3 @3 @3 @3 @ 3 @3 @3 @3 @3 @3
perty of sodium?
@3 @3
A) It is a surface turns black when first exposed to air.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3
B) It is a solid at 25 C and changes to a liquid when heated to 98 C.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
C) When placed in water it sizzles and a gas is formed.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3
D) When placed in contact with chlorine it forms a compound that melts at 801 C.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
E) Sodium is never found as the pure metal in na
@3 @3 @3 @3 @3 @3 @3 @3 @3
ture. Ans: B
@3 Category: Easy
@ 3 @ 3
Section: 1.4 @ 3
12. All of the following are properties of tin. Which one is a chemical property of tin?
@3 @3 @3 @3 @3 @3 @3 @ 3 @3 @3 @3 @3 @3 @3 @3
A) Tin can be hammered into a thin sheet.
@3 @3 @3 @3 @3 @3 @3
B) At –40 C a sheet of tin crumbles to a gray powder.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3
C) Tin melts at 231.9 C. @3 @3 @3
D) When a bar of tin is bent, it emits an audible ―cry‖.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
E) Tin erodes when added to hydrochloric acid, and a clear gas f
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
orms. Ans: E@3 Category: Medium
@ 3 Section: 1.4 @ 3 @ 3
Page 2 @3
, Chapter 01: Introductio @3 @3
n
13. Which one of the following represents a chemical change?
@3 @3 @3 @3 @3 @3 @3 @3
A) boiling water to form steam @3 @3 @3 @3
B) burning a piece of coal @3 @3 @3 @3
C) heating lead until it melts @3 @3 @3 @3
D) mixing iron filings and sand at room temperature
@3 @3 @3 @3 @3 @3 @3
E) breaking glass @3
Ans: B Category: Medium Section: 1.4
@ 3 @ 3 @ 3
14. Which of the following does not represent a chemical change?
@3 @3 @3 @3 @3 @3 @3 @3 @3
A) a freshly cut apple turns brown
@3 @3 @3 @3 @3
B) milk turns sour on standing at room temperature
@3 @3 @3 @3 @3 @3 @3
C) when cooled to 0 C, liquid water becomes ice
@3 @3 @3 @3 @3 @3 @3
D) frying an egg @3 @3
E) fermentation of sugar to alcohol @3 @3 @3 @3 @3
Ans: C Category: Easy
@ 3 @ 3
Section: 1.4 @3
15. The SI prefixes nano and deci represent, respectively:
@3 @3 @3 @3 @3 @3 @3
A) 10– 9 and 10– @3 @3 D) 109 and 10– 6.
@3 @3 @3 @3
6
.
@3
B) 106 and 10– 3. @3 E)
@3 10– 9 and 10–
@3 @3 @3 @3
1
. @3
C) 103 and 10– 3. @3 @3 @3
16. Ans: E Category: Easy Section: 1.7
@ 3 @ 3
The SI prefixes milli and mega represent, respectively:
@3 @3 @3 @3 @3 @3 @3
A) 106 and 10– 6. @3 @3D) 10– 3 and 109.
@3 @3 @3 @3
B) 10– 3 and 106. @3 @3 E) @310– 6 and 10– @3 @3 @3
3
. @3
C) 103 and 10– 6. @3 @3 @3
17.
Ans: B Category: Easy Section: 1.7
@ 3 @ 3
The SI prefixes kilo and centi represent, respectively:
@3 @3 @3 @3 @3 @3 @3
A) 103 and 10– 2. @3 @3 D) 10– 6 and 102.
@3 @3 @3 @3
–1
6
B) 10 and 10 . @3 @3 E) 102 and 10– 3.
@3 @3 @3 @3
C) 10– 3 and 10– @3 @3 @3
18. A2 nanometer corresponds to:
@3 @3 @3
. –2
meters. Easy Section: 1.7 D) 10– 9 meters.
@3
A)
Ans: 10A– 3 Category: @3 @3 @3 @3
10– 12 meters.
@ 3
B) 10 meters. @3 @3 E) @3 @3
C) 10– 6 meters. @3 @3
Ans: D Category: Easy Section: 1.7
@ 3 @ 3 @ 3
19. A microliter corresponds to:
@3 @3 @3
A) 10– 2 liters. B) 10– 3 liters. C) 10– 6 liters. D) 10– 9 liters. E) 10–
@3 @3 @ 3 @3 @3 @ 3 @3 @3 @ 3 @3 @3 @3
12
@3 liters. Ans: C
@3 @3 Category: Easy @ 3 Section: 1.7 @ 3 @ 3
Page 3 @3
@3 @3
1. A tentative explanation for a set of observations that can be tested by
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
further experimentation is referred to as
@3 @3 @3 @3 @3
A) a hypothesis. B) a law.
@3 C) a theory. @ 3 @3 @ 3 @3
D) none of the above. Ans: A
@ 3 @3Category: Easy
@3 @3 @3 @ 3 @ 3
Section: 1.2 @ 3
2. A concise verbal or mathematical statement of a relationship between phenomena t
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
hat is always the same under the same conditions is referred to as
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
A) a hypothesis. B) a law.
@3 C) a theory. @ 3 @3 @ 3 @3
D) none of the above. Ans: B
@ 3 Category: Easy
@3 @3 @3 @3 @ 3 @ 3
Section: 1.2 @ 3
3. A unifying principle that explains a body of facts and relations is referred to as
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
A) a hypothesis. B) a law.
@3 C) a theory. @ 3 @3 @ 3 @3
D) none of the above. Ans: C
@ 3 Category: Easy
@3 @3 @3 @3 @ 3 @ 3
Section: 1.2 @ 3
4. Complete the following sentence. A hypothesis is
@3 @3 @3 @ 3 @3 @3
A) a tentative explanation for a set of observations that can be tested by
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
further experimentation. @3
B) a statement describing a relationship between phenomena that is always the
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @
same under the same conditions.
3 @3 @3 @3 @3
C) a unifying principle that explains a body of facts and relations.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3
D) a model used to visualize the invisib
@3 @3 @3 @3 @3 @3
le. Ans: A
@3 @ 3
Category: Easy Section: 1.2 @ 3 @ 3
5. Complete the following sentence. A scientific law is
@3 @3 @3 @ 3 @3 @3 @3
A) a tentative explanation for a set of observations that can be tested by
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
further experimentation. @3
B) a statement describing a relationship between phenomena that is always the
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @
same under the same conditions.
3 @3 @3 @3 @3
C) a unifying principle that explains a body of facts and relations.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3
D) a model used to visualize the invisib
@3 @3 @3 @3 @3 @3
le. Ans: B
@3 @ 3
Category: Easy Section: 1.2 @ 3 @ 3
6. Complete the following sentence. A theory is
@3 @3 @3 @ 3 @3 @3
A) a tentative explanation for a set of observations that can be tested by
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
further experimentation. @3
B) a statement describing a relationship between phenomena that is always the
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @
same under the same conditions.
3 @3 @3 @3 @3
C) a unifying principle that explains a body of facts and relations.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3
D) a model used to visualize the invisib
@3 @3 @3 @3 @3 @3
le. Ans: C
@3 @ 3
Category: Easy Section: 1.2 @ 3 @ 3
Page 1 @3
, Chapter 01: Introductio @3 @3
n
7. Choose the response that includes all the items listed below that are pure substances.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
i. orange juice ii. steam iii. ocean water iv. oxygen v. vegetable soup
@3 @3 @3 @3 @3 @3 @3 @3
A) i, iii, v
@ 3 @3 B) ii, iv
@3 C) i, iii, iv D) iv only @ 3 @3 @ 3 @3 @3 @ 3 @3
E) all of them are pure Ans: B @ 3 Category: Easy
@3 @3 @3 @3 @3 @ 3 @ 3
Section: 1.2 @ 3
8. Which of the following is an example of a physical property?
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3
A) corrosiveness of sulfuric acid @3 @3 @3
B) toxicity of cyanide @3 @3
C) flammability of gasoline @3 @3
D) neutralization of stomach acid with an antacid @3 @3 @3 @3 @3 @3
E) lead becomes a liquid when heated to 601
@3 @3 @3 @3 @3 @3 @3
C Ans: E
@3 Category: Easy
@ 3 @ 3
Section: 1.4 @ 3
9. Which one of the following is an example of a physical property?
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
A) dynamite explodes D) ice floats on top of liquid water
@3 @3 @3 @3 @3 @3 @3
B) meat rots if it is not refrigerated
@3 E) a silver platter tarnishes
@3 @3 @3 @3 @3 @3 @3 @3
C) gasoline burns @3
Ans: D Category: Easy Section: 1.4
@ 3 @ 3 @ 3
10. Which one of the following represents a physical change?
@3 @3 @3 @3 @3 @3 @3 @3
A) water, when heated to 100 C, forms steam
@3 @3 @3 @3 @3 @3
B) bleach turns hair yellow @3 @3 @3
C) sugar, when heated, becomes brown @3 @3 @3 @3
D) milk turns sour @3 @3
E) apples, when exposed to air, turn bro @3 @3 @3 @3 @3 @3
wn Ans: A
@3 @ 3
Category: Easy Section: 1.4 @ 3 @ 3
11. All of the following are properties of sodium. Which one is a physical pro
@3 @3 @3 @3 @3 @3 @3 @ 3 @3 @3 @3 @3 @3
perty of sodium?
@3 @3
A) It is a surface turns black when first exposed to air.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3
B) It is a solid at 25 C and changes to a liquid when heated to 98 C.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
C) When placed in water it sizzles and a gas is formed.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3
D) When placed in contact with chlorine it forms a compound that melts at 801 C.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
E) Sodium is never found as the pure metal in na
@3 @3 @3 @3 @3 @3 @3 @3 @3
ture. Ans: B
@3 Category: Easy
@ 3 @ 3
Section: 1.4 @ 3
12. All of the following are properties of tin. Which one is a chemical property of tin?
@3 @3 @3 @3 @3 @3 @3 @ 3 @3 @3 @3 @3 @3 @3 @3
A) Tin can be hammered into a thin sheet.
@3 @3 @3 @3 @3 @3 @3
B) At –40 C a sheet of tin crumbles to a gray powder.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3
C) Tin melts at 231.9 C. @3 @3 @3
D) When a bar of tin is bent, it emits an audible ―cry‖.
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
E) Tin erodes when added to hydrochloric acid, and a clear gas f
@3 @3 @3 @3 @3 @3 @3 @3 @3 @3 @3
orms. Ans: E@3 Category: Medium
@ 3 Section: 1.4 @ 3 @ 3
Page 2 @3
, Chapter 01: Introductio @3 @3
n
13. Which one of the following represents a chemical change?
@3 @3 @3 @3 @3 @3 @3 @3
A) boiling water to form steam @3 @3 @3 @3
B) burning a piece of coal @3 @3 @3 @3
C) heating lead until it melts @3 @3 @3 @3
D) mixing iron filings and sand at room temperature
@3 @3 @3 @3 @3 @3 @3
E) breaking glass @3
Ans: B Category: Medium Section: 1.4
@ 3 @ 3 @ 3
14. Which of the following does not represent a chemical change?
@3 @3 @3 @3 @3 @3 @3 @3 @3
A) a freshly cut apple turns brown
@3 @3 @3 @3 @3
B) milk turns sour on standing at room temperature
@3 @3 @3 @3 @3 @3 @3
C) when cooled to 0 C, liquid water becomes ice
@3 @3 @3 @3 @3 @3 @3
D) frying an egg @3 @3
E) fermentation of sugar to alcohol @3 @3 @3 @3 @3
Ans: C Category: Easy
@ 3 @ 3
Section: 1.4 @3
15. The SI prefixes nano and deci represent, respectively:
@3 @3 @3 @3 @3 @3 @3
A) 10– 9 and 10– @3 @3 D) 109 and 10– 6.
@3 @3 @3 @3
6
.
@3
B) 106 and 10– 3. @3 E)
@3 10– 9 and 10–
@3 @3 @3 @3
1
. @3
C) 103 and 10– 3. @3 @3 @3
16. Ans: E Category: Easy Section: 1.7
@ 3 @ 3
The SI prefixes milli and mega represent, respectively:
@3 @3 @3 @3 @3 @3 @3
A) 106 and 10– 6. @3 @3D) 10– 3 and 109.
@3 @3 @3 @3
B) 10– 3 and 106. @3 @3 E) @310– 6 and 10– @3 @3 @3
3
. @3
C) 103 and 10– 6. @3 @3 @3
17.
Ans: B Category: Easy Section: 1.7
@ 3 @ 3
The SI prefixes kilo and centi represent, respectively:
@3 @3 @3 @3 @3 @3 @3
A) 103 and 10– 2. @3 @3 D) 10– 6 and 102.
@3 @3 @3 @3
–1
6
B) 10 and 10 . @3 @3 E) 102 and 10– 3.
@3 @3 @3 @3
C) 10– 3 and 10– @3 @3 @3
18. A2 nanometer corresponds to:
@3 @3 @3
. –2
meters. Easy Section: 1.7 D) 10– 9 meters.
@3
A)
Ans: 10A– 3 Category: @3 @3 @3 @3
10– 12 meters.
@ 3
B) 10 meters. @3 @3 E) @3 @3
C) 10– 6 meters. @3 @3
Ans: D Category: Easy Section: 1.7
@ 3 @ 3 @ 3
19. A microliter corresponds to:
@3 @3 @3
A) 10– 2 liters. B) 10– 3 liters. C) 10– 6 liters. D) 10– 9 liters. E) 10–
@3 @3 @ 3 @3 @3 @ 3 @3 @3 @ 3 @3 @3 @3
12
@3 liters. Ans: C
@3 @3 Category: Easy @ 3 Section: 1.7 @ 3 @ 3
Page 3 @3
