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How do the interactions that are broken in water when it is boiled compare with those
broken when water is electrolyzed?
A. Boiling water breaks intermolecular attractions and electrolysis breaks covalent
bonds.
B. Boiling water breaks covalent bonds and electrolysis breaks intermolecular
attractions.
C. Boiling water and electrolysis of water break covalent bonds.
D. Boiling water and electrolysis of water break intermolecular forces.
Which covalent bond is the most polar?
A. H H
B. H O
C. H N
D. H S
In general, which airborne material is not likely to be affected by the filters or indoor air
handling equipment?
A. particulates
B. pollen
C. soot
D. carbon monoxide
What is the primary component of an exhaled breath?
A. N2
B. O2
C. CO2
D. H2O
The most numerous of the elements are the
A. metals.
B. non metals.
C. metalloids.
D. noble gases.
Which incorrectly pairs over-the-counter drugs with its target function?
A. aspirinanti-inflammatory agent
B. dextromorphancough suppressant
C. ibuprofenantacid
D. pseudoephedrinedecongestant
Ozone is considered an air pollutant in the ________ but is a valuable protective layer
in the __________.
A. troposphere; stratosphere
B. stratosphere; mesosphere
C. stratosphere; troposphere
D. mesosphere; stratosphere
Sulfur oxides have been implicated as important contributors to the problem of acid
rain. What is the principal anthropogenic source of these compounds?
A. transportation
B. coal fired power plants
C. lightning
D. volcanoes
There are approximately 2 1022 molecules and atoms in each breath we take and the
concentration of CO in the air is approximately 9 parts per million. Approximately how
many CO molecules are in each breath we take?
3-11-2013
A. 2 1015
B. 1.8 1017
C. 2 1016
D. 2 1029
Which is not caused by prostaglandins?
A. fever and swelling
B. increased rate of metabolic reactions
C. increased sensitivity of pain receptors
D. inhibition of blood vessel dilation
In which example is the entropy of the initial state lower than the entropy of the final
state?
A. A pot of water boils to produce water vapor at 100C.
B. Librarians put library books back onto the shelves at the end of the day.
C. A raw egg heated at 100C in boiling water becomes hard boiled.
D. Soldiers are called to attention when the general enters the room.
A 4-L sample of water contains 80 g of lead. What is this lead concentration, in parts
per billion (ppb)?
A. 20
B. 80
C. 320
D. 500
Refer to this table when answering Questions.
Which butter substitute has the lowest percentage of monounsaturated fats?
A. Benecol
B. Brummel & Brown
C. I Can't Believe It's Not Butter
D. All of the choices are the same.
Which of these represents an amino acid?
A.
B.
C.
D.
Which ions, if present in drinking water, would pose a significant health risk?
I. Pb2+
II. Hg2+
III. Cd2+
IV. Ca2+
A. I, II, and III only
B. II, III, and IV only
C. I, III, and IV only
D. I, II, III, and IV
Which diagram(s) best represent(s) only molecules?
A. I only
B. II only
C. III only
D. I and II only
E. IV only
Which compound cannot exist as a pair of optical isomers?
A.
B.
C.
D.
Which explanation accounts for the fact that, on average, cloudy nights are warmer than
clear nights?
A. Clouds reflect light incoming from the moon.
B. H2O does not absorb infrared energy.
C. Clouds are composed of water vapor and H2O is a strong greenhouse gas.
D. Clouds have a high concentration of carbon dioxide from fossil fuel combustion.
For safety and other practical reasons, the most logical use for hydrogen as a fuel in the
near future is
A. in an electric power plant.
B. in a fuel cell.
C. for running an automobile.
D. for nuclear fusion.
Why doesn't water naturally become hydrogen and oxygen gas when exposed to light?
A. Thermal energy is the only appropriate type of energy to split water.
B. You must use electrons to split water.
C. Water doesn't absorb the proper wavelength of light to split.
In their fourth and most recent report published in 2007, the vast majority of scientists
agreed on several key points. Which of the following is NOT one of those points?
A. If the rate of greenhouse gas emissions is not curtailed, our water resources, food
supply, and even our health will suffer.
B. Human activities (primarily the combustion of fossil fuels and deforestation) are
responsible for much of the recent warming.
C. The Earth is getting warmer.
D. All of the above were mentioned as key points.
The body's chemical messengers, called _____, are produced in the endocrine glands.
A. enzymes
B. hormones
C. isomers
D. viruses
When it reaches its largest size, the ozone hole over the Antarctic is
A. about as large as North America.
B. about the same size as France.
C. smaller than Iceland.
D. about the same size as Canada.
Which type of water may be considered pure?
A. bottled water
B. filtered water
C. distilled water
D. chlorinated water
Polyethylene can be represented by this drawing.
A molecule of polyethylene has n=1000. What is the molar mass of this molecule? The
atomic masses are: C = 12.01 g/mol; H = 1.01 g/mol.
A. 1000 g/mol
B. 14,030 g/mol
C. 28,060 g/mol
D. 56,120 g/mol
When I and II react together to make nylon, what are the products of the first
condensation reaction?
A.
B.
C.
D.
Which is not a necessary consideration for a battery designed to run a cell phone or
portable MP3 player?
A. It must develop a useful level of electrochemical potential.
B. It must "run" for a reasonable amount of time.
C. It must use liquid, aqueous solutions.
D. It must be fairly light in weight.
Elements in the same column of the periodic table in the Groups labeled A tend to have
similar chemical and physical properties because they have the same number of
A. outer (valence) electrons.
B. protons.
C. protons plus electrons.
D. protons plus neutrons.
Is nuclear power generation associated with producing greenhouse gases?
A. No, it is greenhouse gasemissions free.
B. Yes, but from obtaining the fuel.
C. Yes, they produce as much or more greenhouse gas as a coal plant.
Catalytic converters reduce the amount of ________ in car exhaust.
A. O3
B. CO2
C. CO
D. N2
What is the relationship between stratospheric levels of atomic chlorine and ozone?
A. As chlorine increases, ozone increases.
B. As chlorine increases, ozone decreases.
C. As chlorine changes, the effect on the ozone level is unpredictable.
D. As chlorine changes, there is no effect of the ozone level.
What is biological oxygen demand (BOD)?
A. A measure of the amount of dissolved oxygen microorganisms use up as they
decompose organic wastes found in water.
B. A measure of the amount of dissolved oxygen necessary to purify wastewater.
C. A measure of the phosphate ion concentration of water
D. A measure of nitrate ion concentration of water.
Which is not a pure substance?
A. helium
B. copper wire
C. air
D. sucrose
Nathaniel Wyeth, developer of the plastic soft drink bottles, dreamed of the day when
we will be able to melt down plastic bottles, reinforce the fibers and make car bodies.
Then when we are done with the cars, melt down the car bodies and make bottles out of
them. This would be an ultimate example of
A. biodegradation.
B. incineration.
C. recycling.
D. reuse.
The world map shows the availability of safe drinking water around the world. Which
statement is true?
A. In Australia, less than 75% of the population has access to safe drinking water.
B. In most of Africa, more than 90% of the population has access to clean water.
C. In Europe and Russia, more than 10% of the population does not have access to
clean water.
D. In the United States and Canada, more than 90% of the population has access to
clean water.
