CFCs were originally developed to replace which refrigerant compound(s)?
A. ice
B. HCFCs
C. ammonia and sulfur dioxide
D. propane
Which would be classified as a ‘synthetic” polymer?
A. cellulose
B. wool
C. rubber
D. nylon
Which form of water disinfection continues to provide antibacterial protection after the
water leaves the purification plant?
A. chlorination
B. ozonation
C. UV radiation
D. filtration
A student wants to prepare exactly 250 mL of a 0.500 M aqueous potassium hydroxide
solution. What mass of potassium hydroxide (molar mass = 56.10 g/mol) must the
student dissolve in the 250 mL of solution?
A. 56.1 g
B. 28.1 g
C. 14.0 g
D. 7.01 g
What chemicals replaced CFCs as polymer blowing agents?
A. CO2 and pentane
B. CO2 and H2
C. Pentane and H2
D. Halons
Polystyrene is used to make
A. foam coffee cups and CD cases.
B. garbage bags and CDs.
C. shoes and garden hoses.
D. cell phones and contact lenses.
The O2 molecule breaks apart at lower wavelengths than the O3 molecule.What is the
main reason for this?(Hint: Draw the Lewis structures)
A. O2 is more reactive than O3
B. O3 is more reactive than O2
C. The average bond in O3 is shorter and strongerthan that of O2
D. The average bond in O2 is shorter andstronger than that of O3
Identify the chiral carbon atom in L-dopa (used to treat Parkinson’s disease).
A. 1
B. 2
C. 3
D. 4
Which color, as used in the Air Quality Index, warns that the level of a pollutant is
hazardous, the most dangerous level?
A. orange
B. green
C. yellow
D. maroon
A 0.25 M aqueous solution of potassium chloride, KCl, is tested for conductivity using
the type of apparatus shown. What do you predict will happen?
A. The bulb will not light up. KCl is a nonelectrolyte.
B. The bulb will not light up. KCl is in the molecular form when dissolved in water.
C. The light bulb will shine dimly. KCl is only partially ionized in aqueous solution.
D. The light bulb will shine brightly. KCl is highly ionized in aqueous solution.
Which region of cholesterol is most responsible for its solubility in nonpolar
substances?
A. Region 1
B. Region 2
C. Region 3
D. Region 4
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.
Choose the proper coefficients for each substance to yield a balanced equation.
A. 1, 1, 1
B. 2, 1, 1
C. 2, 1, 2
D. 1, 1, 2
Which of the following is NOT a drawback of using coal for energy production?
A. Mountaintop mining
B. Mercury in fly ash
C. Mining explosions
D. Difficult transportation due to instability
The wavelength of light in the X-ray region of the electromagnetic spectrum is
A. smaller than a virus.
B. intermediate between the size of a bacterial cell and a virus.
C. about the size of a bacterial cell.
D. larger than either a bacterial cell or a virus.
Which of these statements about biodiesel is not true?
A. Biodiesel is made from renewable resources such as vegetable oils and animal fats.
B. Biodiesel is non-toxic and biodegradable.
C. Biodiesel can be used in diesel engines without major modifications.
D. Biodiesel has been withdrawn from several states due to health concerns.
A breeder reactor produces which nuclear fuel?
A. 239Pu
B. 238U
C. 141Ba
D. 235U
The amounts of SO2 and NOx emissions from anthropogenic sources are ______ those
from natural sources.
A. considerably greater than
B. roughly equivalent to
C. somewhat less than
D. considerably less than
Which of the following countries is the largest consumer of coal (by total mass)?
A. China
B. United States
C. India
D. Indonesia
Which bond represents the “peptide” bond?
A. I
B. II
C. III
D. IV
How many carbon atoms are present in this monomer?
A. 2
B. 3
C. 5
D. 8
What atmospheric component is responsible for the natural acidity of rain?
A. nitrogen
B. ozone
C. oxygen
D. carbon dioxide
Which statement(s) concerning SOx and NOx emissions are true?
I. Automobiles produce NOx but very little SOx.
II. Power plants produce only SOx.
III. Diesel powered vehicles produce only SOx.
IV. The high concentration of nitrogen compounds in gasoline accounts for the
formation of NOx by automobiles and trucks.
A. I only
B. I and II only
C. II and IV only
D. I, II, III, and IV
Ozone is a secondary pollutant. A secondary pollutant is
A. not as hazardous as a primary pollutant.
B. not produced directly but as the product of the interaction of two or more pollutants.
C. one that is naturally present in our atmosphere.
D. one that is less hazardous than a primary pollutant.
Two isotopes of a particular element differ from one another by the number of
A. neutrons.
B. protons.
C. protons, neutrons, and electrons.
D. protons plus electrons.
Which argument(s) for the increasing use of solar energy is/are valid?
I. Solar cells are becoming cheaper and increasingly more efficient.
II. The cost of generating electricity from fossil fuels is increasing.
III. Limited and uncertain supply and the increasing requirements for pollution control
are raising the cost of using fossil fuels.
A. I only
B. II only
C. I and III only
D. I, II and III
Which of these incorrectly pairs a hormone with its function?
A. thyroxinregulates metabolism
B. insulinenables the body to use glucose (blood sugar) for energy
C. adrenaline (epinephrine)prepares the body to “fight or flee”
D. progesteronecontrols muscle mass
Very small mercury batteries have been made and used in a multitude of applications.
Why have they been replaced by other kinds of batteries for most applications?
A. Mercury has become far too expensive to use in batteries.
B. Mercury is poisonous and difficult to dispose of.
C. These batteries cannot generate enough current for any modern devices.
D. Though they may be made very small, they are far too heavy to use in most
applications.
What is special about the South Pole versus the North Pole that leads to ozone depletion
only at the south Pole?
A. Ozone molecules are broken up by magnetic forces at the South Pole.
B. The atmosphere is colder at the North Pole than at the South Pole.
C. Polar stratospheric clouds form almost exclusively at the South Pole.
D. There is more land mass at the South Pole than at the North Pole.
Scientists have correlated average global temperature with atmospheric carbon dioxide
levels for the last 160,000 years using ice cores from Antarctica. How is the carbon
dioxide level determined?
A. by measuring the CO2 concentration in trapped air bubblesin the ice layers
B. by measuring the 18O/16O ratio in the CO2 molecules
C. by extrapolating the CO2 level from the temperature of the ice
D. by extrapolating the CO2 level from the average global temperature
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
Some of the uses for polypropylene are yogurt containers, carpeting, luggage, and bottle
caps. Which is not a property of polypropylene?
A. high melting point
B. very tough
C. transparent
D. resistant to oils
Which reaction accounts for the fact that the pH of rain is naturally slightly acidic?
A. CO2 + H2O → H+ + HCO3
B. SO3 + H2O → 2 H+ + SO4
2
C. Ca2+ + CO2 + H2O → CaCO3 + 2 H+
D. NO2 + H2O → 2 H+ + NO3
A proton released by an acid in aqueous solution quickly reacts with water to form a
hydronium ion. What product is formed when a proton reacts with ammonia (NH3)?
A. NH3+
B. NH4
C. NH2
D. NH4+