Which of the following is most biologically damaging type of radiation?
A. UV-A
B. UV-B
C. UV-C
D. Infrared
The two main products of the combustion of gasoline in an automobile engine are
A. oxygen and carbon monoxide.
B. sulfur oxides and nitrogen oxides.
C. sulfur oxides and hydrogen.
D. water and carbon dioxide.
The history of average global temperature for the last 160,000 years is derived from
isotopic analysis of ice layers in Antarctica. Scientists study the ______ ratio in ______.
A. 14C/12C; CH4
B. 1H/2H; H2O
C. 12C/14C; CO2
D. 16C/18O; CO2
What two factors are considered when determining the risk assessment for air
pollutants?
A. exposure and ppm
B. percentage and ppm
C. toxicity and percentage
D. toxicity and exposure
Consider the process of condensation polymerization. Which statement is false?
A. A small molecule like water is often formed as the monomers combine to form the
polymer.
B. The product contains all of the atoms of the starting materials.
C. PET is formed using this process.
D. Nylon is formed using this process.
As fuel cells become more widely accepted and are used more, we will
A. become less dependent on electrical energy.
B. become more dependent on fossil fuels and less dependent on renewable resources
for power generation.
C. be able to generate electricity in places where we cannot now do so.
D. use coal as our primary energy source.
In a solar cell, semiconductors of the p-type and n-type are placed in contact with each
other via a conducting wire. In order to generate an electric current, which of the
following must be true?
5-22-2013
A. An external battery must be attached
B. Light shining on the system will cause oxidation to occur
C. Light shining on the system must have enough energy to set electrons in motion from
the n-type semiconductors to the p-type
D. Light shining on the system must have enough energy to set electrons in motion
from the p-type semiconductors to the n-type
Most of the sulfur in coal originates from
A. decaying vegetation in swamps and peat bogs.
B. sulfate ions (SO42-) naturally present in sea water.
C. sulfur deposits located adjacent to coal deposits.
D. the natural sulfur content of the plants making up the coal.
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.
Which reaction represents an acid-base neutralization reaction?
A. HNO2 + H2O → H3O+ + NO2
B. NaOH + H2O → H3O+ + NaO
C. Ba(OH)2 + 2LiCl → BaCl2 + 2LiOH
D. Be(OH)2 + H2SO4 → BeSO4 + 2H2O
The energy stored in the chemical bonds of fossil fuels is a form of ______ energy.
A. electrical
B. mechanical
C. potential
D. kinetic
What is the purpose of the hot KOH solution in the fuel cell?
A. It is the product of the reaction between the hydrogen, the oxygen, and the
electrodes.
B. It keeps the electrodes conditioned and ready to work at high efficiency.
C. It is part of the acid-base reaction that generates the electricity in most fuel cells.
D. It maintains electroneutrality by working as an electrolyte; allowingtransfer ofions
between the half cells where the hydrogen and oxygen react.
Free radicals are
A. highly reactive chemical species.
B. species with unpaired electrons.
C. species such as H” and “OH.
D. All of these correctly describe free radicals.
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
The name of the compound formed by combining carbon atoms with oxygen atoms
to form is
A. carbon oxide.
B. monocarbon dioxide.
C. carbon dioxide.
D. carbonate.
Reverse osmosis is illustrated in this diagram. What is this process used for?
A. to purify water by ion exchange
B. to remove dissolved salts from sea water
C. for the ozonation of water supplies
D. to add fluorine to municipal water supplies
Use this table to answer the questions.
Which statement below is correct?
A. Oils always have low percentages of saturated fat.
B. Lard has more saturated fat than butter.
C. All dietary fats have some percentage of saturated fats.
D. Butter has the smallest amount of polyunsaturated fat.
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
Which color in the rainbow has the shortest wavelength?
A. orange
B. red
C. yellow
D. blue
Potable water is water that
A. contains residual chlorine.
B. is safe to drink and to cook with.
C. is contaminated with lead.
D. contains too much residual ozone to be drinkable.
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.
These are the densities of some common plastics: PET 1.38 to 1.39 g/mL; HDPE 0.95
to 0.97 g/mL; LDPE 0.90 to 0.91 g/mL. Based on these densities, which plastic/s will
sink in an ethanol/water mixture that has a density of 0.94 g/mL?
A. PET only
B. PET and HDPE
C. HDPE only
D. LDPE only
This is a structural formula for propylene.
Which of these represents the “head-to-tail, head-to-tail” arrangement of monomers in
polypropylene?
A.
B.
C.
D.
Which increases the efficiency of a photovoltaic or solar cell?
I. Replacing crystalline silicon with its non-crystalline form.
II. Increasing the number of alternating p– and n-type layers of semiconductors.
III. Decreasing the thickness of each alternating p– and n-type layer of semiconductor.
A. I and II only
B. II and III only
C. I and III only
D. I, II, and III
Which common process on earth is endothermic?
A. the production of oxygen by photosynthesis
B. ozone decomposing into O2 in the upper atmosphere
C. water freezing to form ice at 0C
D. the reaction of wood with oxygen to form carbon dioxide, water, and ash
Single bonds, double bonds, and triple bonds
A. have 1, 2, and 3 shared electrons, respectively.
B. have 2, 4, and 6 shared electrons, respectively.
C. have 3, 6, and 9 shared electrons, respectively.
D. are only possible between carbon atoms.
This is the condensed structural formula for acetaminophen, the active ingredient in the
over-the-counter medication Tylenol. What is the molecular formula of acetaminophen?
A. C8H5NO2
B. C8H11NO2
C. C8H9NO2
D. C8H8NO
In this photovoltaic (solar) cell,
the n-type semiconductor is in the region labeled
A. A
B. B
C. C
D. D
Which naturally occurring radioactive particles are negatively charged?
A. alpha particles
B. beta particles
C. gamma radiation
D. neutrons
Which square(s) contain(s) only an element?
A. I only
B. II only
C. I and II only
D. III and IV only
As compared to high-level nuclear waste, low-level nuclear waste
A. has longer half-lives.
B. is contaminated with smaller quantities of radioactive material.
C. includes spent fuel rods.
D. can be disposed of in landfills.