Which of the following statements is true?
A. Over-the-counter (OTC) drugs are not screened by the FDA.
B. More than 700 OTC products were once only available by prescription.
C. Drug manufacturers are against switching a prescription drug to OTC status.
D. Only NSAIDS can switch to OTC status.
Which statement best describes the functions of the COX-1 and COX-2 enzymes?
A. COX-1 primarily makes hormones that maintain proper kidney function and repair
the stomach lining while COX-2 makes prostaglandins associated with inflammation,
pain, and fever.
B. COX-1 makes prostaglandins associated with inflammation, pain, and fever while
COX-2 primarily makes hormones that maintain proper kidney function and repair the
stomach lining.
C. COX-1 primarily makes steroids related to secondary sexual characteristics while
COX-2 makes prostaglandins associated with inflammation, pain, and fever.
D. COX-1 makes NSAID drugs associated with inflammation, pain, and fever like
ibuprofen and aspirin while COX-2 primarily makes hormones that maintain proper
kidney function and repair the stomach lining.
Coal is not a pure chemical compound, but its elemental composition can be
approximated by the formula C135H96NO9S. What is the approximate percentage by
mass of sulfur in coal?
A. 0.413%
B. 1.68%
C. 3.11%
D. 42.8%
Which squares contain mixtures?
A. II and III only
B. III and IV only
C. I, III, and IV only
D. I and IV only
Which of the following statements is not true?
A. The generic version of a drug is usually less expensive than the original version.
B. The generic version of a drug cannot be marketed until the patent protection on the
pioneer drug has expired.
C. Generic drugs do not have to duplicate the efficacy and safety testing required of the
counterpart pioneer drug.
D. The FDA requires that the generic drug be bioequivalent to the pioneer drug; that is,
it should deliver the same amount of active ingredient into a patient’s bloodstream at the
same rate.
P2O5 is the chemical formula for
A. pentoxygen diphosphide.
B. diphosphorus pentoxide.
C. dioxygen pentaphosphide.
D. monophosphorus pentoxide.
Which does not contribute to your annual radiation dose?
A. the type of structure you live in
B. the amount of time you spend riding in jet planes
C. the number of dental X-rays you get each year
D. the number of hours you spend listening to the radio
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.
Which compound should be the most soluble in water?
A.
B.
C.
D.
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
Decreased stratospheric ozone concentrations may lead to
A. increased incidences of melanomas.
B. harm toyoung marine life.
C. an increased occurrence of cataracts.
D. All of these choices are correct.
Why are mountaintops more susceptible than grassy plainsto acid deposition?
A. They are made of softer rock.
B. They contact clouds with more concentrated acid droplets.
C. They are often buried under snow.
D. There is less oxygen at high altitude.
Which type of widely used battery is not rechargeable?
A. zinc-manganese alkaline
B. lithium-ion
C. lead-acid (storage batteries)
D. nickel-cadmium (NiCad)
The EPA regulates the presence of nitrates and nitrites in water because
A. they produce nitrogen in the blood, causing a condition similar to the bends deep sea
divers can suffer from.
B. as with ammonium nitrate fertilizers, they may cause small explosions in blood
vessels causing them to rupture.
C. they interact with naturally occurring ozone in the body and remove it from the
circulatory system.
D. they interact with the blood and limit its ability to transport oxygen.
How much energy is equivalent to1.0 104 kg of matter? (speed of light = 3.0 108 m/s)
A. 3.0 104 J
B. 3.0 107 J
C. 9.0 1012 J
D. 9.0 1015 J
Which of these represents the best Lewis structure for acetylene (C2H2)?
A. A
B. B
C. C
D. D
The Intergovernmental Panel on Climate Change (IPCC) issued a report in 2007 that
attached probabilities to the predictions and statements made. Which
prediction/statement was considered “Very Unlikely”?
A. Human-caused emissions are the main factor causing warming since 1950.
B. Arctic sea ice thickness declined about 40% during late summer to early autumn in
recent decades
C. The observed warming over the past 100 years is due solely to climatic variability.
D. In most of the areas in the Northern Hemisphere, precipitation has increased
Scientists predict that shells of someocean creatures will start to dissolve after how
many more years of ocean acidification?
A. 40 years
B. 150 years
C. 300 years
D. 85 years
The diagram below shows a simplified version of a fractionating column used in the
petroleum industry.
The compounds that are obtained at position D are
A. asphalt.
B. gasoline.
C. jet fuel.
D. refinery gases.
Calculate the amount of sulfur dioxide produced annually by a power plant that burns
7.5 million metric tons (t) of coal over a year. Assume that the coal is 2.4% sulfur by
mass. 1 metric ton (t) = 1000 kg.
A. 3.6 x 108 kg
B. 3.6 x 108 t
C. 1.8 x 1011 kg
D. 7.5 x 1012 g
Which square(s) contain(s) only an element?
A. I only
B. II only
C. I and II only
D. III and IV only
Which feature or process is unique to nuclear power plants when compared to
conventional coal-burning power plants?
A. formation of steam
B. smoke stacks
C. stream turbines
D. control rods
Which is an oxidation half-reaction?
A. 2 H2 + O2 → 2 H2O
B. Zn → Zn2+ + 2 e
C. 2 HCl + Ba(OH)2 → 2 H2O + BaCl2
D. Cl2 + 2 e → 2 Cl
How many protons, neutrons, and electrons are there in the neutral atom of ?
A. A
B. B
C. C
D. D
The general formula for coal is C135H96NOS, the molecular formula for methane is
CH4 and the molecular formula for dodecane is C12H26. Which will the heat of
combustion of polyethylene be more similar to?
A. coal
B. methane
C. dodecane
D. hydrogen gas
Based on this graph, which group of economies is predicted to have the largest energy
consumption in2025?
A. Mature market economies
B. Emerging economies
C. Transitional economies
D. No way to know
What factors are considered in determining the global warming potential for a particular
molecule?
I. Relative contribution of a molecule of gas to global warming
II. Lifetime in the atmosphere
III. Atmospheric concentration
A. I only
B. I and II only
C. I and III only
D. II and III only
Which is not a consequence of hydrogen bonding between water molecules?
A. Water has a high boiling point.
B. Ice floats on water.
C. Water has a high specific heat.
D. Water is colorless and odorless.
Which component of the air makes up approximately 100 times more of an exhaled
breath than of an inhaled breath?
A. Ar
B. O2
C. O3
D. CO2
From 1974 to 2002, the chance that a white male would be diagnosed with melanoma
skin cancer rose by
A. 18%.
B. 31%.
C. 100%.
D. 225%.