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Which region of the ultraviolet spectrum is absorbed least by the atmosphere?


A) UV-A
B) UV-B
C) UV-C
D) They are all absorbed approximately equally

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Single bonds,double bonds,and triple bonds


A) have 1,2,and 3 shared electrons,respectively.
B) have 2,4,and 6 shared electrons,respectively.
C) have 3,6,and 9 shared electrons,respectively.
D) are only possible between carbon atoms.

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The "ozone layer" is found


A) only around the equator.
B) in the troposphere.
C) in the stratosphere.
D) in the mesosphere.

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Increasing wavelength of light goes in this order.


A) Ultraviolet > visible > infrared
B) Visible > infrared > ultraviolet
C) Infrared > visible > ultraviolet
D) Ultraviolet > infrared > visible

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In Earth's atmosphere,where is the ozone layer? In Earth's atmosphere,where is the ozone layer? A) Troposphere B) Biosphere C) Mesosphere D) Stratosphere


A) Troposphere
B) Biosphere
C) Mesosphere
D) Stratosphere

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D

Which is one of the Lewis structures for ozone?


A) Which is one of the Lewis structures for ozone? A) B) C) D)
B) Which is one of the Lewis structures for ozone? A) B) C) D)
C) Which is one of the Lewis structures for ozone? A) B) C) D)
D) Which is one of the Lewis structures for ozone? A) B) C) D)

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UV-B radiation has a frequency of approximately 1017 s¯1.What is the energy of a photon of this light?


A) 1.99 × 10¯42 J
B) 6.63 × 10¯17 J
C) 4.19 × 108 J
D) 1.51 × 1050 J

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Which of the following is most biologically damaging type of radiation?


A) UV-A
B) UV-B
C) UV-C
D) Infrared

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How do mineral nanoparticles in sunscreens protect from UV radiation?


A) The particles scatter incoming UV light
B) The particles absorb incoming UV light
C) The particles dissolve with incoming UV light
D) None of these choices are correct

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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

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Decreased stratospheric ozone concentrations may lead to


A) increased incidences of melanomas.
B) harm to young marine life.
C) an increased occurrence of cataracts.
D) All of these choices are correct

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D

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.

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B

The two chemical bonds and geometry of water are best represented by


A) The two chemical bonds and geometry of water are best represented by A) B) C) D)
B) The two chemical bonds and geometry of water are best represented by A) B) C) D)
C) The two chemical bonds and geometry of water are best represented by A) B) C) D)
D) The two chemical bonds and geometry of water are best represented by A) B) C) D)

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The speed of light in air


A) depends only on the frequency of the light.
B) depends only on the wavelength of light.
C) is independent of the wavelength and frequency of light.
D) depends on both the wavelength and the frequency of light.

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Which statement is correct?


A) UV-A is the most energetic of the three forms of UV light
B) UV-B is the most energetic of the three forms of UV light
C) UV-C is the most energetic of the three forms of UV light
D) UV-A,UV-B,and UV-C are equally energetic

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Why are HFCs environmentally superior to the currently used HCFCs?


A) HFCs are not flammable
B) HFCs do not contain chlorine
C) HFCs are lighter and may be transported more easily
D) HFCs are less reactive than HCFCs

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In reference to waves,frequency is the


A) number of waves passing a fixed point in one second.
B) height of the wave.
C) distance between successive peaks in a wave.
D) distance between a peak in a wave to the next trough.

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Which is the correct Lewis structure?


A) Which is the correct Lewis structure? A) B) C) D)
B) Which is the correct Lewis structure? A) B) C) D)
C) Which is the correct Lewis structure? A) B) C) D)
D) Which is the correct Lewis structure? A) B) C) D)

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Chlorofluorocarbons rise to the stratosphere and


A) react directly with stratospheric ozone to destroy it.
B) interact with UV energy to produce free radicals that destroy ozone.
C) interact with UV energy to produce free radicals that react with oxygen to create ozone.
D) react with free radicals to remove carbon dioxide.

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Which contributes to the ozone hole?


A) Automobile exhaust
B) Chlorofluorocarbons (CFCs)
C) Loss of northern forests
D) All of these choices are correct

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