Which functional groups are present in all amino acids?
A. amine ( NH2) groups only
B. acid ( COOH) groups only
C. amine and acid groups
D. single and double bonds between carbon atoms
Which concentration is consistent with a basic solution?
A. MH+ = 3.2 x 103 M
B. MOH- = 3.6 x 109 M
C. MH+ = 9.7 x 104 M
D. MOH- = 3.4 x 103 M
A polar covalent bond is created when
A. a metallic element reacts with a nonmetallic element.
B. two atoms share their bonding electrons unequally.
C. two atoms share three or more electrons.
D. two atoms of the same element form double or triple bonds.
By approximately what percentage did global production of CFCs fall from 1987 to
2000?
A. 13%
B. 44%
C. 88%
D. 1100%
Determine the molar mass for fluoxetine (C16H16F3NO), also known as Prozac.
A. 279.3 g/mol
B. 281.3 g/mol
C. 295.3 g/mol
D. 297.1 g/mol
If 500 mL of air contains 2 x 1022 particles (atoms and molecules), how many particles
do you inhale in one day if you breathe 15000 L of air?
A. 2 x 1022
B. 6 x 1026
C. 1.2 x 1027
D. 5 x 1024
How is wind energy related to the sun?
A. It has no relation.
B. Wind turbines need solar panels to operate correctly.
C. The heat of the sun drives large-scale movements of air.
D. Wind turbines only operate during daylight hours.
Which of the following has the highest boiling point?
A. Propane
B. Octane
C. Methane
D. Butane
Chemical energy is converted directly into electrical energy in
A. a galvanic cell.
B. an electrical power plant.
C. an electrolytic cell.
D. an automobile’s engine.
This graph compares the recycling of plastics in Sweden and the United States.
From this graph it is apparent that the percentage of plastics that Sweden recycled in
2004 was approximately ___ times the percentage that was recycled in the United
States in that year.
A. 80
B. 8
C. 6
D. 4
What condition must be met for a battery to be rechargeable?
A. Either its anode or its cathode must generate a gas as a result of the electrochemical
reaction.
B. It must generate electricity via an acid-base reaction rather than via an
oxidation-reduction reaction.
C. The battery must be open to the outside so that it can vent any internal pressure that
builds up from gases within it.
D. The electrochemical reaction of the battery must be reversible.
Bases are substances that increase the hydroxide ion concentration in aqueous solution.
Why does ammonia (NH3), which does not contain a hydroxide group, act as a base?
A. Ammonia acts as a base only in the presence of hydroxide ion-containing
compounds.
B. Ammonia molecules remove protons from water molecules, forming hydroxide ions.
C. Ammonia molecules donate protons to water molecules, forming hydroxide ions.
D. Ammonia acts as a base only in the presence of very strong acids.
Why are HFCs inappropriate for long-term replacement of CFCs?
A. They are flammable.
B. They are very toxic.
C. They absorb infrared radiation.
D. They are an appropriate replacement.
Which reaction illustrates how acid rain causes the decomposition of marble
monuments?
A. Ca(OH)2 + H2+ → Ca2+ + 2 H2O
B. CaCO3 + 2 H+ → Ca2+ + CO2 + H2O
C. 4 Fe2+ + O2 + 4 H2O → 2 Fe2O3 + 8 H+
D. Ca(OH)2 + 2 H2O → CaO22 + 2 H3O+
Of the following, which radioactive element is found most commonly in our food?
5-21-2013
A. 23Mg
B. 40K
C. 131I
D. 90Sr
Which atmospheric component does not contribute to global warming?
A. H2O
B. CO2
C. N2
D. O3
Which of the following is not a “clean coal” technology already in use?
A. “Coal washing” to remove sulfur and other mineral impurities from the coal before it
is burned.
B. “Gasification” to convert coal to a mixture of carbon monoxide and hydrogen. The
resulting gas burns at a lower temperature, thus reducing the generation of nitrogen
oxides.
C. “Wet scrubbing” to chemically remove SO2 before it goes up the smokestack. This is
accomplished by reacting the SO2 with a mixture of ground limestone and water.
D. “Sequestration” to capture and store CO2 before it is emitted into the atmosphere.
Isopentyl acetate (shown here) is used as a flavoring agent in food. Its fragrance is that
of bananas. What functional group(s) is(are) present in this compound?
A. ester only
B. ketone only
C. ketone and ether only
D. ester, ether, and ketone
Which is not a benefit associated with nuclear power plants?
A. efficient production of electricity
B. reduction of CO2 in the atmosphere
C. inexpensive to operate
D. helps reduce the levels of acid rain
The hydronium ion concentration in a solution with pH 10 is __________ than the
hydronium ion concentration in a solution with pH 13.
A. 1,000 times less
B. 3 times greater
C. 1,000 times greater
D. 100 times less
Which of the following is/are true about Maximum Contaminant Level Goals
(MCLGs)?
I. The MCLG for any contaminant that is regulated as a carcinogen is set to zero.
II. An average person weighing 70 kg (154 lb) could drink two liters (about two quarts)
of water containing a contaminant at the MCGL level every day for 70 years without
suffering any ill effects.
III. The Maximum Contaminant Level (MCL) set by the EPA may be higher than the
MCLG to account for the financial and technical barriers that may make achieving
these goals difficult.
IV. The MCLG for a contaminant is always set to zero because this is the best way to
protect human health.
A. II only
B. I and II only
C. I, II, and III only
D. I, II, III, and IV
Which pair represents isomers?
A.
B.
C.
D.
Which if the following is the chemical symbol for silver?
A. Au
B. Pb
C. Ag
D. Fe
Predict the products of this reaction: KOH + HNO3 →
A. KNO3 + H2O
B. KNO2 + H2O2
C. KH + HNO4
D. KO4 + H2N
Which substance is not considered to be an air pollutant?
A. N2
B. SO2
C. NO2
D. O3
Which practices might be described as carbon sequestration?
I. Planting trees
II. Deforestation
III. Pumping carbon dioxide deep into the ocean
IV. Increasing combustion of fossil fuels
A. I and II only
B. II and III only
C. III and IV only
D. I and III only
Find the molar mass of ethanol, C2H6O.
A. 29.02 g/mol
B. 45.06 g/mol
C. 46.07 g/mol
D. 110.0 g/mol
Which of the following is not a consequence of biomagnification?
A. Consumption of tuna should be limited.
B. DDT from fish was killing large birds before the pesticide was banned.
C. Lead in water can lead to brain damage in children.
D. Polar compounds are found in high concentrations in predator animals.
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 is one of the Lewis structures for ozone?
A.
B.
C.
D.