Test Bank for Chemistry for Changing
Times, New Edition
Science is tentative, explanatory, and
A. Unpredictable
B. Testable
C.Mystical
D.Absolute - answers B. Testable
Scientific results must be verified by:
A. Further experiment
B. Constructing plausible theories
C. Consulting noted scientific authorities
D. Government agencies - answers A. Further experiment
Kim Chemist proposes that increasing the proportion of butadiene in her glue
formulation will make the glue stickier. Her proposal is called a(n):
A. Hypothesis
B. Theory
C. Experiment
D. Law - answers A. Hypothesis
Which of the following is NOT true for a scientific law:
A. It summarizes observed scientific data
B. It explains observed scientific data
C. It is often stated in mathematical terms
D. It is universal and will hold everywhere under stated conditions - answers B. It
explains observed scientific data
The results of an experiment are easiest to interpret when the experiment has
________ variable(s).
A. 4
B. 2
C. 1
D. 10 - answers B. 2
Which of the following statements about chemistry is NOT true.
A .Chemistry affects every area of our daily lives
B. Chemistry is an important component of the economy of the US
C. Chemistry products account for 10% of US exports every year
D. All are correct - answers D. All are correct
Which of the following does NOT involve chemistry:
A. Materials for computers
, B. Recycling of basic materials
C. Increased agricultural yields
D. None of the above - answers D. None of the above
On Mars gravity is one-third that on Earth. What would be the weight on Mars of a
person who weighs 150 lbs on Earth:
A. 50lbs
B. 100lbs
C. 200lb
D. 150lb - answers A. 50 lbs
Which of the following is a physical change:
A. Ice melts at 0*C
B. Carbon combines with oxygen to form carbon dioxide
C. Water is decomposed by electricity into hydrogen and oxygen
D. A red substance is decomposed by heat to form mercury and oxygen - answers A.
Ice melts at 0*C
Refined white table sugar is usually derived from either sugar cane or sugar beets.
Irrespective of the source of table sugar, after refining it always has the same
composition of carbon, hydrogen and oxygen. Sugar is best classified as which one of
the following:
A. Ideal mixture
B. Compound
C. Element
D. Mixture - answers B. Compound
By definition, which of the following can be broken down into simpler substances:
A. Liquid
B. Element
C. Gas
D. Compound - answers D. Compound
A mixture containing 50 grams of carbon and 75 grams of oxygen is sealed in a flask.
The total mass of the system which includes the carbon, the oxygen and the sealed
flask is 225 grams. The flask is heated to cause the carbon and oxygen to react. The
sealed flask is massed. What is the mass of the sealed flask:
A. 150g
B. 175g
C. 125g
D. 225g - answers Im not sure
The amount of carbon on the earth, including the atmosphere:
A. is increasing due to plant and animal growth on the planet
B. is essentially constant
C. fluctuates dramatically with the seasons
Times, New Edition
Science is tentative, explanatory, and
A. Unpredictable
B. Testable
C.Mystical
D.Absolute - answers B. Testable
Scientific results must be verified by:
A. Further experiment
B. Constructing plausible theories
C. Consulting noted scientific authorities
D. Government agencies - answers A. Further experiment
Kim Chemist proposes that increasing the proportion of butadiene in her glue
formulation will make the glue stickier. Her proposal is called a(n):
A. Hypothesis
B. Theory
C. Experiment
D. Law - answers A. Hypothesis
Which of the following is NOT true for a scientific law:
A. It summarizes observed scientific data
B. It explains observed scientific data
C. It is often stated in mathematical terms
D. It is universal and will hold everywhere under stated conditions - answers B. It
explains observed scientific data
The results of an experiment are easiest to interpret when the experiment has
________ variable(s).
A. 4
B. 2
C. 1
D. 10 - answers B. 2
Which of the following statements about chemistry is NOT true.
A .Chemistry affects every area of our daily lives
B. Chemistry is an important component of the economy of the US
C. Chemistry products account for 10% of US exports every year
D. All are correct - answers D. All are correct
Which of the following does NOT involve chemistry:
A. Materials for computers
, B. Recycling of basic materials
C. Increased agricultural yields
D. None of the above - answers D. None of the above
On Mars gravity is one-third that on Earth. What would be the weight on Mars of a
person who weighs 150 lbs on Earth:
A. 50lbs
B. 100lbs
C. 200lb
D. 150lb - answers A. 50 lbs
Which of the following is a physical change:
A. Ice melts at 0*C
B. Carbon combines with oxygen to form carbon dioxide
C. Water is decomposed by electricity into hydrogen and oxygen
D. A red substance is decomposed by heat to form mercury and oxygen - answers A.
Ice melts at 0*C
Refined white table sugar is usually derived from either sugar cane or sugar beets.
Irrespective of the source of table sugar, after refining it always has the same
composition of carbon, hydrogen and oxygen. Sugar is best classified as which one of
the following:
A. Ideal mixture
B. Compound
C. Element
D. Mixture - answers B. Compound
By definition, which of the following can be broken down into simpler substances:
A. Liquid
B. Element
C. Gas
D. Compound - answers D. Compound
A mixture containing 50 grams of carbon and 75 grams of oxygen is sealed in a flask.
The total mass of the system which includes the carbon, the oxygen and the sealed
flask is 225 grams. The flask is heated to cause the carbon and oxygen to react. The
sealed flask is massed. What is the mass of the sealed flask:
A. 150g
B. 175g
C. 125g
D. 225g - answers Im not sure
The amount of carbon on the earth, including the atmosphere:
A. is increasing due to plant and animal growth on the planet
B. is essentially constant
C. fluctuates dramatically with the seasons
