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Consider these three compounds.
Which are isomers?
A. I and II only
B. I and III only
C. II and III only
D. I, II, and III
Yellow light has a wavelength of 580 nm. What is the frequency of this light?
A. 2.39 1019 s1
B. 1.80 107 s1
C. 5.17 105 s1
D. 5.17 1014 s1
What is the correct name for (NH4)2CO3?
A. biammonium carbonate
B. ammonium bicarbonate
C. ammonium carboxide
D. ammonium carbonate
A fuel cell does not "run down" like a standard battery because
A. the reactants in a battery must be stored inside the battery, whereas the reactants for
a fuel cell flow in as needed.
B. a fuel cell continually recycles the same electrons, whereas a battery must
continually generate new ones.
C. a battery is completely dependent upon oxidation-reduction reactions, whereas a fuel
cell depends on acid-base reactions.
D. a battery has many moving parts, whereas a fuel cell has none.
Elements in the same column of the periodic table in the Groups labeled A tend to have
similar chemical and physical properties because they have the same number of
A. outer (valence) electrons.
B. protons.
C. protons plus electrons.
D. protons plus neutrons.
What functional groups are present in all amino acids?
A. alkyl group and amino group
B. carboxylic acid and amino group
C. alcohol and carboxylic acid
D. alcohol and amino group
The energy of motion is called _________ energy.
A. electrical
B. mechanical
C. potential
D. kinetic
What do the letters HDPE represent?
A. high definition polyethylene
B. high density polyethylene
C. hard durable polyethylene
D. highly ductile polyethylene
Which of the following statements is not true about PEM fuel cells?
4-25-2013
A. PEM fuel cells rely on inexpensive catalysts.
B. PEM fuels cells are cleaner than gasoline powered vehicles.
C. PEM fuel cells have safe and efficient fuel storage.
D. PEM fuel cells have limited driving range.
How many protons, neutrons, and electrons are there in the neutral atom of ?
A. A
B. B
C. C
D. D
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.
Enzymes are
A. biochemical catalysts that influence the rate of chemical reactions.
B. compounds used to relieve inflammation in muscles and joints.
C. proteins that produce fever and swelling.
D. special hormones that influence the rate of chemical reactions.
What metal is used to dope an n-type semiconductor?
A. arsenic
B. cadmium
C. gallium
D. silicon
What do the "Big Six" polymers have in common?
A. They all are formed by addition polymerization.
B. They all are formed by condensation polymerization.
C. They all are thermoplastics (can be melted and shaped).
D. They all contain branched chains.
Which is a known risk associated with nuclear power plants?
A. The electricity produced will be radioactive.
B. The water used to cool the system will become radioactive.
C. The workers will have higher risks for cancer than the standard population.
D. The cooling water source can suffer thermal pollution.
Based on this graph, which group of economies is predicted to have the largest energy
consumption in 2010?
A. mature market economies
B. emerging economies
C. transitional economies
D. impossible to say
Which naturally occurring type of radiation has the greatest penetrating power?
A. alpha
B. beta
C. gamma
D. they are all the same
What is the role of polar stratospheric clouds (PSCs) on the destruction of ozone?
A. The cold clouds react with ozone to make oxygen molecules and oxygen atoms.
B. Chemical reactions occur on the clouds that convert molecules that do no damage to
those that deplete ozone.
C. They play no role.
D. The clouds are made of chlorine atoms from CFCs.
What is the concentration of hydroxide ions in an aqueous solution containing [H+] = 1
x 10-5 M?
A. 1 x 10-5 M
B. 1 x 10-7 M
C. 1 x 10-9 M
D. 1 x 10-14 M
The term "pharmacophore" was originally described by the Nobel Prize winner Paul
Ehrlich more than 100 years ago. What is the meaning of this term?
A. the correct dose at which a drug should be administered
B. the three dimensional arrangement of a drug responsible for its biological activity
C. the form in which a drug is prepared for oral consumption
D. the group of compounds responsible for euphoria
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
In the periodic table, which elements typically have similar properties?
A. those in the same rows
B. those related diagonally
C. those in the same columns
D. those on opposite sides
Which ions, if present in drinking water, would pose a significant health risk?
I. Pb2+
II. Hg2+
III. Cd2+
IV. Ca2+
A. I, II, and III only
B. II, III, and IV only
C. I, III, and IV only
D. I, II, III, and IV
Why are automobiles a contributor to acid rain when there is no sulfur in gasoline to
make SOx?
A. This is incorrect because there is sulfur in gasoline.
B. Catalytic converters contain sulfur compounds.
C. Hydrocarbons contribute to acid rain, also.
D. Nitrogen from the atmosphere combines with oxygen in the hot engine to make
NOx.
The diagram shows a cartoon describing the lock and key model of biological
interactions. What do A and B represent?
A. A represents an enzyme and B represents a drug or hormone.
B. A represents a drug or hormone and B represents an enzyme.
C. A represents a drug or hormone and B represents a cell membrane receptor site.
D. A represents a cell membrane receptor site and B represents a drug or hormone.
Methane is approximately 23 times more powerful than carbon dioxide as a greenhouse
gas. Which are significant sources of methane emissions?
I. The digestive systems of ruminants (cows, sheep, etc.)
II. Automobile exhaust
III. Rice cultivation
IV. Decaying wetland vegetation
A. I only
B. I and II only
C. II only
D. I, III, and IV only
If 1.8 x 1014 J is releasedin a nuclear reaction, how much matter was lost?
A. 2.0 x 103 kg
B. 7.2 x 102 kg
C. 6.0 x 105 kg
D. 1.6 x 1031 kg
Tropospheric ozone (O3) is a greenhouse gas. Why is O3not assigned a Global Warming
Potential (GWP)?
A. Ozone molecules absorb only low energy infrared frequencies.
B. Ozone molecules have a low molecular weight.
C. Tropospheric ozone concentrations are not changed by human activity.
D. Ozone has a relatively short lifetime in the troposphere and its distribution is not
uniform around the world.
Which nitrogen-containing substance is generally unreactive?
A. NO
B. NaNO2
C. N2
D. NH3
The two chemical bonds and geometry of water are best represented by:
A.
B.
C.
D.
In order to make useful predictions, which factors must be accounted for by climatic
models?
I. Cooling effect of atmospheric aerosols
II. Smoke, haze, and cloud cover
III. Change in land use
IV. Combustion of fossil fuels
A. IV only
B. II and III only
C. III and IV only
D. I, II, III, and IV
Which of the following is a weak base?
A. HCl
B. NaOH
C. NH3
D. LiOH
A triglyceride is
A. an ester of a fatty acid and three glycerol molecules.
B. an ester of three fatty acids and one glycerol molecule.
C. a polymer of fatty acids.
D. a polymer of glycerol.
The ability of a molecule to absorb infrared radiation is measured with IR
spectrometers, which report the frequency of light absorbed in units of cm1. Which
explanation best describes this unit?
A. the distance traveled by light of a specific frequency in 1 second
B. the number of wavelengths in 1 cm for a specific frequency of light
C. the wavelength of a specific frequency of light
D. the speed of a specific frequency of light
