Fundamentals of General, Organic, and Biological Chemistry 8th edition by John E. McMurry test bank

A) solid
B) liquid
C) gas
D) a mixture of solid and liquid
E) a mixture of liquid and gas
Answer:  B
Diff: 3
Section:  1.2
LO:  1.2
Global LO:  G9
 
16) Malic acid, a compound used to increase the acidity of fruit-flavored products, freezes at 128°C and boils at 150°C. What is its phase at 100°C, a temperature used in food processing applications?
A) solid
B) liquid
C) gas
D) a mixture of solid and liquid
E) a mixture of liquid and gas
Answer:  A
Diff: 3
Section:  1.2
LO:  1.2
Global LO:  G9
17) Which factor determines the state of matter in which a substance exists?
A) amount
B) color
C) density
D) odor
E) temperature
Answer:  E
Diff: 3
Section:  1.2
LO:  1.2
Global LO:  G2
 

18) Which of the following are states of matter?
A) solid
B) suspension
C) solution
D) precipitate
E) all of the above
Answer:  A
Diff: 1
Section:  1.2
LO:  1.2
Global LO:  G2
 
19) Barium sulfate is described as a white crystalline solid that melts at 1580°C and decomposes at 1600°C. At a temperature of 500°C, you would expect a sample of barium sulfate to be a
A) colorless liquid.
B) white crystalline solid.
C) yellow liquid.
D) white cloud of vapor.
E) form that cannot be determined.
Answer:  B
Diff: 3
Section:  1.2
LO:  1.2
Global LO:  G9
 
20) Which of the following is a pure substance?
A) root beer
B) bleach
C) eggs
D) gasoline
E) neon
Answer:  E
Diff: 1
Section:  1.3
LO:  1.3
Global LO:  G1

21) Which of the following observations demonstrates that a solid sample is a compound?
A) It cannot be broken down into simpler substances by chemical methods.
B) It cannot be broken down into simpler substances by physical methods.
C) Heating the substance causes it to melt, then to boil.
D) Heating the substance causes no visible color change.
E) Crushing the sample does not affect its other properties.
Answer:  B
Diff: 1
Section:  1.3
LO:  1.3
Global LO:  G1
 
22) A pure substance
A) always has the same elemental composition.
B) is composed of more than one element.
C) can be broken into its components by physical means.
D) is chemically inert.
E) changes color when placed in bright sunlight.
Answer:  A
Diff: 1
Section:  1.3
LO:  1.3
Global LO:  G1
 
23) Which of the following is a mixture?
A) cough syrup
B) iron
C) helium
D) sodium hydrogen carbonate
E) steam
Answer:  A
Diff: 2
Section:  1.3
LO:  1.3
Global LO:  G1
 

24) Which of the following can be classified as a pure compound?
A) alcohol in water, OH in O
B) sugar,
C) carbon, C
D) iodine,
E) Sulfur, S8
Answer:  B
Diff: 2
Section:  1.3
LO:  1.3
Global LO:  G1
25) List and describe two differences between pure substances and mixtures.
Answer:  1. The composition of a pure substance is always the same, regardless of the source, but the composition of a mixture can vary.
2. Mixtures can be separated into their components by physical changes; some pure substances can be separated into components by chemical change.
Diff: 1
Section:  1.3
LO:  1.3
Global LO:  G1
 
26) Vegetable oil is a(an) ________, and is found in the ________ phase.
A) element; liquid
B) compound; solid
C) mixture; liquid
D) compound; gas
E) mixture; solid
Answer:  C
Diff: 2
Section:  1.3
LO:  1.3
Global LO:  G1
 

27) A reddish powder is heated gently in a loosely covered container. After the heating a silvery metal remains in the container, and a glowing wooden splint placed into the container bursts into flame. The original substance is a(an) ________, and the solid and gas produced are ________.
A) element; compounds
B) compound; elements
C) mixture; compounds
D) compound; compounds
E) mixture; elements
Answer:  B
Diff: 3
Section:  1.3
LO:  1.3
Global LO:  G1
 
28) Each symbol denotes an element except
A) Co.
B) CO.
C) Cu.
D) C.
E) Cl.
Answer:  B
Diff: 1
Section:  1.4
LO:  1.4
Global LO:  G1
29) Which of the following is an element?
A) fire
B) iron
C) salt