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Explain what occurs when excited molecules and ions return to their electronic ground state from their excited state.

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emission o...

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emphysema


A) 1 and 5
B) 2 and 3
C) 3 and 5
D) 3 and 4
E) 4 and 5

F) None of the above
G) A) and E)

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Plants extract phosphate from the soil


A) by converting it to the dihydrogen phosphate ion by addition of acid to the soil near roots.
B) by converting it to phosphoric acid.
C) by osmosis.
D) by leaching.
E) by fixation.

F) B) and E)
G) B) and C)

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Currently the CO2 content of Earth's atmosphere is approximately


A) 1%.
B) 20%.
C) 25 ppm.
D) 330 ppm.
E) 600 ppm.

F) A) and D)
G) C) and D)

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Which of these species is not an acidic oxide?


A) P4O10
B) P4O6
C) SO3
D) CO
E) SiO2

F) B) and E)
G) A) and E)

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Which below is a CFC?


A) CFCl3
B) CF2Cl2
C) C2F3Cl3
D) all of the
E) None of these choices is correct.

F) A) and E)
G) All of the above

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The depletion of ozone is particularly serious at Earth's poles because


A) these cold areas experience little lightning.
B) there are more industries in these areas.
C) there is little O2 in these regions due to the earth's magnetic fields.
D) polar "ice clouds" act as catalysts to convert HCl to Cl2.

E) A) and B)
F) A) and D)

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Which is not a characteristic property of a chlorofluorocarbon?


A) Relatively innert
B) Readily liquified
C) Toxic
D) Use as coolants

E) A) and B)
F) None of the above

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What is the name given the condition leading to the formation of ice particles over Antarctica?


A) polar ice caps (PICs)
B) ice deposition (ID)
C) polymorphs (PMs)
D) vortex traps (VTs)
E) polar stratospheric clouds (PSCs)

F) All of the above
G) B) and E)

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Mars has an atmosphere made mostly of oxygen.

A) True
B) False

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About 80% of the total mass of air is in the


A) ionosphere.
B) stratosphere.
C) mesosphere.
D) thermosphere.
E) troposphere.

F) A) and E)
G) B) and E)

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What are the primary pollutants from automobile exhaust?

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NO,CO,and ...

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What are the common indoor pollutants?

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CO,CO2,and ...

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Which of the following is not a greenhouse gas?


A) O3
B) CO2
C) NO
D) O2
E) Neither nor is a greenhouse gas

F) C) and E)
G) A) and B)

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Which of these reactions is an example of nitrogen fixation?


A) 2N2O → 2N2 + O2
B) NH3 + H2O → NH4+ + OH-
C) N2 + O2 → 2NO
D) 2NO2 + H2O → HNO2 + HNO3
E) 2NO + O2 → 2NO2

F) B) and D)
G) A) and C)

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Nitric acid is converted to ______________ in the soil.

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Which of the following are common indoor pollutants?


A) radon
B) carbon dioxide
C) carbon monoxide
D) formaldehyde
E) all of the

F) C) and E)
G) B) and D)

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List three primary pollutants removed from automobile exhaust by catalytic converters.

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CO,NO,unbu...

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Ozone is destroyed naturally by the absorption of short-wavelength light.

A) True
B) False

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The process in which a gaseous substance is converted into a condensed,more usable chemical substance is called


A) differentiation.
B) liquefaction.
C) fixation.
D) deposition.
E) remediation.

F) All of the above
G) C) and D)

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