Thermal pollution is possible at water sources near
5-21-2013
A. coal-burning plants.
B. nuclear plants.
C. both coal-burning and nuclear plants.
D. neither coal-burning nor nuclear plants.
Which compound cannot exist as a pair of optical isomers?
A.
B.
C.
D.
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.
Superglue is made from this monomer, cyanoacrylate.
Which is a representation of the head-to-tail to head-to-tail arrangement of the
polymer?
A.
B.
C.
D.
Skin, hair, muscle, and enzymes are all made of protein, which is a natural polymer.
Proteins are
A. polyesters.
B. polyethylenes.
C. polyamides.
D. polyalcohols.
The energy equivalent of a certain cheeseburger is approximately 525 Cal. Since 1 Cal
is 4.184 kJ this corresponds to
A. 1.25 kJ.
B. 125 kJ.
C. 220 kJ.
D. 2200 kJ.
Which of the following would bedescribed as”fine particles”?
A. SOx
B. NOx
C. O3
D. 2.5 μm diameter soot
The chemical formula for nitrogen monoxide is:
A. N2O
B. NO
C. NO2
D. N2O3
Argon, which comprises almost 1% of the atmosphere, is approximately 27 times more
abundant than CO2, but does not contribute to global warming. Which explanation
accounts for this fact?
A. Single atoms do not have bonds, therefore do not vibrate.
B. Argon’s vibrational energy is not excited by infrared radiation.
C. Argon atoms are concentrated too high in the troposphere to interact with the earth’s
radiant energy.
D. Argon is not an anthropogenic pollutant.
Identify the single most effective strategy to reduce carbon dioxide emissions.
A. Use methane rather than gasoline for fuel in cars and trucks.
B. Develop alternate energy sources that do not rely on fossil fuels.
C. Use wood as a home heating fuel.
D. Convert all vehicles to diesel fuel.
Which two gases make up more than 95% of an inhaled breath?
A. NO2 and N2
B. CO2 and O2
C. O2 and N2
D. N2 and Ar
The father of modern medicine, Hippocrates, described making a tea that was effective
against fever by boiling willow bark. Years later, the active ingredient was isolated and
chemically modified to produce the drug we now know as
A. acetaminophen.
B. aspirin.
C. ibuprofen.
D. penicillin.
The radioactive decay series of 238U terminates at which nonradioactive isotope?
A. 210Tl
B. 210Bi
C. 206Pb
D. 144Ba
Which contributes to the ozone hole?
A. automobile exhaust
B. chlorofluorocarbons (CFCs)
C. loss of Northern forests
D. All of these choices are correct.
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.
How many moles of sodium chloride are there in 250 mL of a 1.20 M sodium chloride
solution?
A. 0.30
B. 0.60
C. 1.2
D. 2.4
The structure of ozone most closely resembles a
A. linear molecule with different lengths of chemical bonds, for example, .
B. linear molecule with the same length of chemical bonds, for example, .
C. bent molecule with different lengths of chemical bonds, for example, .
D. bent molecule with the same length of chemical bonds, for example, .
During a chemical reaction,
A. atoms are rearranged.
B. some atoms are destroyed and new ones are formed.
C. some elements are destroyed and new ones are formed.
D. the law of conservation of matter and mass may be briefly violated.
Silicon has 4 electrons in its outer energy level, gallium has 3. Adding small amounts of
gallium to pure silicon
A. destroys the ability of the silicon to act as a semiconductor.
B. provides the basis for using the silicon as a fuel cell.
C. creates a p-type semiconductor.
D. creates an n-type semiconductor.
Calculate the mass of 25,000 molecules of nitrogen gas.(1 mole = 6.02 x 1023
molecules)
A. 5.81 10″19 g
B. 1.16 10″18 g
C. 7.00 105 g
D. 5.38 1026 g
Why is it so expensive to ship hydrogen as a liquid as is often done with other gas?
A. Hydrogen is very heavy to ship.
B. Hydrogen is very dense to ship.
C. Hydrogen has to be shipped at a very low temperature.
D. Hydrogen in very flammable.
Of five major gaseous components of air, which is the only one to vary significantly in
concentration from place to place and from day to day?
A. water vapor
B. carbon dioxide
C. nitrogen
D. argon
Which of the following statements is true?
A. Over-the-counter (OTC) drugs are not screened by the FDA.
B. More than 700 OTC products were once only available by prescription.
C. Drug manufacturers are against switching a prescription drug to OTC status.
D. Only NSAIDS can switch to OTC status.
P2O5 is the chemical formula for
A. pentoxygen diphosphide.
B. diphosphorus pentoxide.
C. dioxygen pentaphosphide.
D. monophosphorus pentoxide.
Reforming processes can store hydrogen fuel in a liquid form as another molecule.
Which of the following cannot be reformed into hydrogen?
A. methanol
B. gasoline
C. diesel
D. carbon dioxide
Which of the following has the highest MCL in drinking water in the US?
A. Nitrates
B. Trihalomethanes
C. Lead
D. Mercury
The label on a popular brand of margarine states it is made from “partially
hydrogenated” corn oil. Which statement is false?
A. The liquid oil has become a solid fat.
B. The margarine has more saturated fat (C C) than the corn oil.
C. The margarine has the same amount of unsaturated fat (C C) as the corn oil.
D. The margarine has more hydrogens than the corn oil.
Which of these polymers is made by the process of condensation polymerization?
A. polyethylene
B. polystyrene
C. polyvinyl chloride
D. polyethylene terephthalate
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.
The burning of coal produces sulfur dioxide, SO2, a pollutant that slowly reacts in air to
form SO3. Sulfur trioxide dissolves into airborne water droplets to form a very
corrosive solution of sulfuric acid. Which is a product of burning coal that hastens the
transformation of sulfur dioxide into sulfur trioxide?
A. carbon dioxide
B. carbon monoxide
C. nitrogen dioxide
D. particles of ash
The first law of thermodynamics states that
A. energy is the capacity to do work.
B. doing work is defined as causing movement against a resisting force.
C. heat flows from a warmer body to a cooler body.
D. energy is neither created nor destroyed.
Determine the shape or geometry of PH3. (Hint: Use the Periodic Table to arrive at the
electron configuration for phosphorous.)
A. tetrahedral
B. trigonal pyramidal
C. bent
D. trigonal planar
The common OTC medication ibuprofen is sold as a racemic mixture although only the
L-isomer is a pain reliever. What does the term “racemic mixture” mean?
A. There is an equal mixture of the + and – optical isomers in the drug preparation.
B. There are two active ingredients in the drug preparation.
C. The inactive optical isomer does not cause serious side effects.
D. The inactive isomer is transformed into the active isomer in the body.
Which compound has an incorrect formula?
A. MgPO4
B. (NH4)2S
C. Mg(HSO3)2
D. NaClO4