Which of these synthetic polymers is most closely related to the natural protein
polymers?
A. polyester
B. nylon
C. polystyrene
D. polyvinyl chloride
How are HDPE and LDPE different?
A. Only one is a member of the “Big Six.”
B. They are made from different monomers.
C. One has branched chains while one is linear.
D. One is made by addition polymerization, one by condensation.
Which product of the ultraviolet decomposition of CFCs acts as the catalyst for ozone
decomposition?
A. oxygen atoms
B. chlorine atoms
C. fluorine atoms
D. hydrogen atoms
How are HDPE and LDPE different?
A. Only one is a member of the “Big Six.”
B. They are made from different monomers.
C. One has branched chains while one is linear.
D. One is made by addition polymerization, one by condensation.
Which process plays the most important role in the greenhouse effect?
A. Energy from the sun is reflected back into the atmosphere.
B. Energy from the sun is absorbed by the earth.
C. Energy from the sun is absorbed by the atmosphere.
D. Energy radiated by the earth is absorbed by the atmosphere.
Why are generic versions of some prescription drugs not always available?
A. The prescribed drug may still be protected by the 20-year patent.
B. The prescribed drug may be derived from a common herb.
C. The drug company that developed the drug has not agreed to allow other companies
to make the drug.
D. The manufacturers of generic drugs have not completed the efficacy and safety
testing of the generic drug.
What percentage of Earth’s water is in the oceans?
A. 97%
B. 50%
C. 3%
D. 0.014%
Which factor did not play a major role in the formation of fossil fuels from plant
matter?
A. high temperatures
B. high pressures
C. an absence of O2
D. an abundance of sunlight
The most abundant greenhouse gas in Earth’s atmosphere is:
A. CO2
B. H2O vapor
C. N2
D. CH4
Which of these statements are correct for both addition and condensation
polymerization?
I. Monomer units chemically bond together.
II. Product contains all the atoms of the starting material.
III. A second product, like water, is also formed during the polymerization process.
A. I only
B. I and II
C. II only
D. II and III
What forces hold the two strands of DNA together?
A. covalent bonds
B. ionic bonds
C. salt bridges
D. hydrogen bonds
Use the equation to help you calculate the heat of combustion of ethylene, C2H4. The
bond energies are: C H 416 kJ/mol; C C 356 kJ/mol; C C 598 kJ/mol; O O 498
kJ/mol; C O 803 kJ/mol; H O 467 kJ/mol.
The heat of combustion of ethylene is
A. +220 kJ/mol.
B. +1216 kJ/mol.
C. -754 kJ/mol.
D. -1324 kJ/mol.
At present, it will be difficult and perhaps inappropriate to develop an economy based
on burning hydrogen rather than natural gas or gasoline because
A. hydrogen is a dirty fuel. Burning hydrogen produces significantly more pollutants
than burning natural gas or gasoline.
B. hydrogen is not an efficient fuel. Per gram, hydrogen has about the lowest heat of
combustion of any known substance, much lower than natural gas or gasoline.
C. although hydrogen is abundant, pure hydrogen is not found naturally on earth.
Hydrogen is difficult or expensive to isolate and collect.
D. being such a light element, hydrogen will not flow through pipelines the way natural
gas or gasoline do. Hydrogen cannot easily be delivered from where it is produced to
the places where it is needed.
What moves in the salt bridge from the cathode to the anode?
A. electrons
B. Zn+2 ions
C. Cu+2 ions
D. anions
Compounds that reduce fever are called _____; compounds that reduce pain are called
____.
A. analgesics; antipyretics
B. analgesics; hormones
C. antipyretics; analgesics
D. antipyretics; prostaglandins
Which shows the balanced equation for the reaction of nitrogen ( ), as it is normally
found in our atmosphere, with oxygen ( ), as it is normally found in our atmosphere,
to form nitrogen dioxide?
A.
B.
C.
D.
Every amino acid has four groups attached to a central carbon atom. What are the four
groups?
A. NH2, OH, side chain, H
B. NH2, HCl, side chain, H
C. NH2, COOH, side chain, H
D. R group, COOH, side chain, OH
Which is not a polymer of glucose?
A. cellulose
B. cholesterol
C. glycogen
D. starch
Given this diagram,
this semiconductor is
A. made of pure silicon.
B. carrying an extra electron.
C. missing an electron.
D. excited by a photon.
Sulfur dioxide, the primary product of sulfur combustion, further reacts with oxygen as
shown.
2 SO2 + O2 → 2 SO3
What is the final step in the formation of the acidic aerosol?
A. Reaction of sulfur trioxide with nitrogen oxide.
B. Reaction of sulfur trioxide with water.
C. Reaction of sulfur trioxide with sodium hydroxide.
D. Reaction of sulfur trioxide with nitrogen gas.
A substance that is hygroscopic
A. absorbs and retains moisture from the atmosphere.
B. releases water to the atmosphere.
C. purifies water by removing nitrate and sulfate ions.
D. prevents atmospheric gases from forming aerosols.
Which country has the highest per capita emission of carbon dioxide?
A. United States
B. Germany
C. Canada
D. Saudi Arabia
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.
Land use changes have a big impact on global warming because of their effect on
albedo. Albedo
A. is the primary wave number at which a greenhouse gas absorbs infrared radiation.
B. describes the effectiveness of a molecule as a greenhouse gas.
C. is the ratio of electromagnetic radiation reflected by a surface to the amount of
radiation hitting that surface.
D. describes the tendency of an atmospheric molecule to react with other atmospheric
molecules, reducing their global atmospheric lifetimes.
Stratospheric ozone is destroyed and formed at the same rate
A. above the equator.
B. above the Antarctic in its early spring.
C. above the Antarctic in its early fall.
D. above the equator and above the Antarctic in its early fall.
A disadvantage of ozonation over chlorination is
A. the higher cost of ozonation.
B. ozonation does not protect the water after the initial process is complete.
C. the higher cost of ozonation and ozonation does not protect the water after the initial
process is complete.
D. None of these choices is correct.
Halons differ from CFCs in that the atoms of ______ replace some ______ atoms.
A. iodine; chlorine
B. hydrogen; chlorine
C. bromine; chlorine
D. silicon; carbon
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.
What is the primary component of an exhaled breath?
A. N2
B. O2
C. CO2
D. H2O
Adipic acid, one of the monomers used to make nylon, has a total of six carbon atoms
with two carboxylic acid functional groups. Which structure is correct?
A. (CH2)6 COOH
B. HO (CH2)6 OH
C. HOOC (CH2)4 COOH
D. HOOC (CH2)6 NH2
Of the following, which may be removed from the market only when the US
government can prove harm?
A. Prescription drugs
B. Over the counter drugs
C. Herbal remedies
D. All of the above
Which is not a form of chlorine used to disinfect water?
A. chlorine gas
B. chloroform
C. sodium hypochlorite
D. calcium hypochlorite