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Which symbol(s) represent(s) elements in the noble gas family?
A. X and Z
B. P and L
C. Q
D. Y
The Montreal protocol is a
A. treaty to protect against global warming.
B. treaty to reduce the amount of CFCs produced in the world.
C. list of substitutes for CFCs.
D. way to destroy CFCs in the stratosphere.
Predict the geometry of nitrous oxide, N2O (atomic order N N O).
A. linear
B. bent
C. trigonal pyramidal
D. trigonal planar
The formula for a sulfate ion is SO4
2. What is the formula of gallium (Ga) sulfate?
A. GaSO4
B. Ga2SO4
C. Ga2(SO4)3
D. Ga3(SO4)2
In which part of the bodydoes radioactive I-131 accumulate?
A. liver
B. pituitary gland
C. thyroid gland
D. adrenal glands
What is the current expert consensus concerning the role of acid rain on the health of
forests?
A. Acid rain is indisputably responsible for the declining health of many forests.
B. Acid rain is not responsible for any of the decline observed in many forests.
C. Acid rain weakens trees and the surrounding soil, leaving them susceptible to disease
and insects.
D. There is not sufficient evidence that acid rain has caused an appreciable decline in
the health of any forests.
Which of the following is NOT a likely consequence of increased carbon dioxide
concentrationin the atmosphere?
A. Sea ice disappearance
B. Sea-level rise
C. Changes in ocean chemistry
D. Increase in biodiversity
A monomer is
A. a single polymer chain.
B. a polymer made from only one component.
C. a small molecule used to make a polymer chain.
D. a polymer molecule that only contains a single element.
Which is not an example of an over-the-counter medication?
A. cough suppressants, such as dextromorphan.
B. antacids and indigestion aids, such as calcium or magnesium salts.
C. anti-anxiety drugs, such as valium.
D. motion sickness drugs, such as diphenhydramine.
Which polymer is incorrectly matched with its use?
A. LDPEplastic bag
B. HDPEmilk jug
C. PScontact lenses
D. PETsoda bottles
HCFCs are a temporary solution to the problem of ozone depletion and will be replaced
over the next 20 years by which class of compounds?
A. HFCs
B. CFCs
C. halons
D. HFBCs
UV-B radiation has a frequency of approximately 1017 s1. What is the energy of a
photon of this light?
A. 1.99 x 1042 J
B. 6.63 x 1017 J
C. 4.19 x 108 J
D. 1.51 x 1050 J
Numbers 1 through 4 are used to identify four different elements. Based on periodic
table trends, which number identifies the element that is expected to have the greatest
tendency to attract a shared pair of electrons?
A. 1
B. 2
C. 3
D. 4
Which radiation source is the biggest contributor to the average annual dose?
A. home building materials
B. food, air, and water
C. a nuclear power plant within 50 miles
D. fallout from nuclear weapons testing
A NiCd battery uses nickel and cadmium to produce a potential difference. Using these
equations, answer the following questions.
I. 2NiO(OH) (s) + 2H2O (l) + 2 e- → 2Ni(OH)2(s) + 2 OH (aq)
II. Cd (s) + 2OH (aq) → Cd(OH)2 (s) + 2e
III. Cd (s) + 2NiO(OH) (s) + 2 H2O (l) → 2 Ni(OH)2(s) + Cd(OH)2(s)
Which equation best represents the reduction half-reaction?
A. I
B. II
C. III
D. I and II
In this electrochemical cell, the reduction half reaction is
A. Cu2+(aq) + 2 e → Cu(s)
B. Zn(s) → Zn2+(aq) + 2 e
C. Zn(s) → Cu(s)
D. Cu2+(aq) → Zn2+(aq)
If a snack cake contains 450 food Calories and Dr. Wattenburger is able to burn 250
Calories by running for one-half an hour, how long must she run to completely burn off
the snack cake?
A. 54 minutes
B. 18 minutes
C. 1.21 hours
D. You can't tell
Which atoms are present in all proteins?
A. C, H, O, N
B. C, H, O, S
C. C, H, O only
D. C, H, N only
The world map shows the availability of safe drinking water around the world. Which
statement is true?
A. In Australia, less than 75% of the population has access to safe drinking water.
B. In most of Africa, more than 90% of the population has access to clean water.
C. In Europe and Russia, more than 10% of the population does not have access to
clean water.
D. In the United States and Canada, more than 90% of the population has access to
clean water.
Nathaniel Wyeth, developer of the plastic soft drink bottles, dreamed of the day when
we will be able to melt down plastic bottles, reinforce the fibers and make car bodies.
Then when we are done with the cars, melt down the car bodies and make bottles out of
them. This would be an ultimate example of
A. biodegradation.
B. incineration.
C. recycling.
D. reuse.
The chemical formula for nitrogen monoxide is:
A. N2O
B. NO
C. NO2
D. N2O3
What is the correct name for (NH4)2CO3?
A. biammonium carbonate
B. ammonium bicarbonate
C. ammonium carboxide
D. ammonium carbonate
The majority of N2O molecules in the atmosphere come from
A. bacterial removal of nitrate ions (NO3) from soil.
B. burning of fossil fuels.
C. decaying vegetable matter.
D. landfills.
Which correctly pairs an indoor pollutant with its source?
A. formaldehyde and unvented space heaters
B. O3 and electrical arcing
C. radon and glues and solvents
D. nicotine and paint and paint thinners
Light behaves like
A. a particle.
B. a wave.
C. both a particle and a wave.
D. neither a particle nor a wave.
From 1974 to 2002, the chance that a white male would be diagnosed with melanoma
skin cancer rose by
A. 18%.
B. 31%.
C. 100%.
D. 225%.
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 is correct?
A. Ozone forms by combining an oxygen atom with an oxygen molecule.
B. There is a dynamic steady state of ozone in the stratosphere.
C. UV radiation will dissociate ozone into an oxygen atom and an oxygen molecule.
D. All of these choices are correct.
The energy that flows from a warmer body to a colder body is called
A. heat.
B. temperature.
C. potential.
D. work.
The level of protein structure that involves hydrogen bonding between the atoms of the
polypeptide backbone is
A. primary.
B. secondary.
C. tertiary.
D. double helix.
Assume that an extremely inefficient electrical utility company delivers electrical
energy to your home from a natural gas-burning power plant with an overall efficiency
of only 31% and your furnace is 85% efficient in converting electrical energy into heat
energy.What mass of natural gas the power plant must burn if heating your home
requires 3.5 107 kJ?The heat of combustion of natural gas is 50.1 kJ/g.
A. 2650 kg
B. 8550 kg
C. 2250 kg
D. 10,100 kg
Which of the following is a proper use for a calorimeter?
A. Measuring heat of combustion
B. Measuring temperature of a mixture
C. Measuring the amount of oxygen consumed in a combustion reaction
D. Measuring entropy of a reaction
Which is the balanced equation for the fission of U-235?
A.
B.
C.
D.
The secondary structure of a protein is the
A. overall shape or conformation of the molecule.
B. conformation of amino acids in a segment of polypeptide.
C. identity and sequence of amino acids present.
D. association of one protein chain with another.
The most abundant greenhouse gas in Earth's atmosphere is:
A. CO2
B. H2O vapor
C. N2
D. CH4
