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Which of the following is a pure substance?
A. Lemonade
B. Concrete
C. Gasoline
D. Silver wire
Morphine, opium and oxycodone are categorized into which"drug schedule"?
A. I
B. II
C. III
D. IV
Which of the following is not a "clean coal" technology already in use?
A. "Coal washing" to remove sulfur and other mineral impurities from the coal before it
is burned.
B. "Gasification" to convert coal to a mixture of carbon monoxide and hydrogen. The
resulting gas burns at a lower temperature, thus reducing the generation of nitrogen
oxides.
C. "Wet scrubbing" to chemically remove SO2 before it goes up the smokestack. This is
accomplished by reacting the SO2 with a mixture of ground limestone and water.
D. "Sequestration" to capture and store CO2 before it is emitted into the atmosphere.
The nucleus of an atom contains
A. electrons and protons only.
B. protons only.
C. electrons, protons, and neutrons.
D. protons and neutrons only.
Which of the following has the longest half-life?
A. U-238
B. U-235
C. C-14
D. Pu-231
Consider the following equation that describes the complete combustion of propane,
C3H8.
The bond energies are: C H 416 kJ/mol; C C 356 kJ/mol; O O 498 kJ/mol; C O
803 kJ/mol; H O 467 kJ/mol. Which is the amount of energy gained on making all the
bonds in carbon dioxide and water according to the equation?
A. -1270 kJ/mol
B. -2540 kJ/mol
C. -4277 kJ/mol
D. -8554 kJ/mol
Which formula below represents a trans fatty acid?
A.
B.
C.
D.
Where is most of the carbon on earth stored?
A. in the form of fossil fuels and carbonate minerals and rocks
B. in the forests and soil
C. in surface water
D. in the atmosphere
What is biodegradation?
A. breaking up the plastics into small pieces before putting them into a landfill
B. using bacteria and fungi to "eat" the waste plastic
C. a way to dispose of natural polymers only
D. breaking down polymers into carbon dioxide and water
Which substance is an element?
A. NO2
B. NaCl
C. N2
D. CH4
If the lead concentration in water is 1 ppm, then we should be able to recover 1 mg of
lead from ____ L of water.
A. 0.01
B. 0.1
C. 1
D. 10
You often hear the phrase, "You are what you eat." Which statement is true?
A. The food we eat provides the fundamental material to keep our bodies functioning.
B. Eating fats will make you fat because your body cannot digest fats.
C. The carbohydrates that you eat will cause your body to retain water, making you
look bloated.
D. If you eat a lot of protein, your hair and nails will grow faster.
Which factor will support the growth of nuclear energy in the future?
A. smaller, more efficient reactor design
B. a ban on the use and development of breeder reactors
C. tax incentives for the oil and gas industry
D. high cost of new, safer technology
The rad (radiation absorbed dose) is defined as the absorption of 0.01 J of radiant
energy per kilogram (0.01 J/kg) of body weight. What is the radiation dose for a 50 kg
woman exposed to 0.85 J of energy?
A. 0.085 rad
B. 0.017 rad
C. 1.70 rad
D. It depends on the radiation source.
In this photovoltaic (solar) cell,
the n-type semiconductor is in the region labeled
A. A
B. B
C. C
D. D
If a body needs approximately 1 Cal/kg of body weight per hour, about how many
calories would a 75-kg (165 pounds) man need per day?
A. 1650 Cal/day
B. 1800 Cal/day
C. 3900 Cal/day
D. 7500 Cal/day
Semiconductors, such as the element silicon, may be used in cells that convert solar
radiation to electricity. One of the major difficulties encountered in using silicon is that
it
A. is one of the rarest of all elements and therefore difficult to find on earth.
B. is expensive to produce large quantities of extremely pure silicon.
C. quickly evaporates when isolated in a pure state.
D. is the most active of all the elements, so it cannot be prepared in a pure state.
Any chemical or physical change that absorbs energy
A. has high activation energy.
B. is an endothermic process.
C. is an exothermic process.
D. is a catalyzed process.
Which synthetic polymer is used to makeshatter-resistant bottles and fleece fabric?
A. PET
B. HDPE
C. PVC
D. PS
The greenhouse and enhanced greenhouse effects refer to the return of approximately
___ percent and greater than ___ percent of the heat radiated by Earth.
A. 40; 40
B. 50; 50
C. 60; 60
D. 80; 80
Which anthropogenic pollutants are implicated in the formation of most acidic
precipitation?
A. carbon oxides
B. phosphoric acid and hydrochloric acid
C. ozone and carbon monoxide
D. nitrogen oxides and sulfur oxides
Radiative forcings are
A. geological changes that promote volcanic eruptions.
B. mechanisms for sequestering CO2 endorsed by signers of the Kyoto Protocol.
C. factors that influence the balance of Earth's incoming and outgoing rediation.
D. changes in geographical distribution of plant, animal, and insect species brought on
by climate change.
At water treatment plants aluminum sulfate and calcium hydroxide are added to
A. neutralize excess ozone.
B. neutralize excess chlorine.
C. remove suspended clay and dust particles.
D. neutralize excess acidity or basicity.
Which corresponds to the composition of the ion typically formed by fluorine?
A. A
B. B
C. C
D. D
Soft lignite (brown coal) is the lowest grade of coal. Since it has undergone the least
change since burial, its chemical compositionand hence its heat of combustionis most
similar to that of
A. natural gas.
B. petroleum.
C. water.
D. wood.
Calculate the percentage decease in NOx emissions after clean coal technology was
installed at the Milliken power station.
A. 0.4%
B. 40%
C. 60%
D. 160%
The heat energy released or absorbed by a chemical reaction is generally determined by
the difference between the energy that
A. must be put in to break the bonds in the reactants and the energy that must be put in
to make the bonds in the products.
B. must be put in to break the bonds in the reactants and the energy that is released
upon making the bonds in the products.
C. is released upon breaking the bonds in the reactants and the energy that must be put
in to make the bonds in the products.
D. is released upon breaking the bonds in the reactants and the energy that is released
upon making the bonds in the products.
Balance this equation P4 + Cl2 → PCl5 with the smallest whole number coefficients.
Choose the answer that is the sum of the coefficients.Do not forget coefficients of
"one".
A. 7
B. 9
C. 11
D. 13
E. 15
Which characteristics pertain to the problem of global warming?
I. Possible consequences include altered climate and increased sea level.
II. Heat energy radiated by the earth is captured by atmospheric molecules.
III. Increased skin cancer incidence and damage to radiation sensitive species has been
observed.
IV. The concentration of stratospheric ozone is declining.
A. I and II only
B. I and III only
C. II and IV only
D. III and IV only
The basal metabolism rate (BMR) is
A. the minimum amount of energy required daily for your body to function.
B. the same value for all people within an age group.
C. dependent on a person's daily caloric intake.
D. usually higher for women because they weigh less than men.
