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Chemistry, 7/e
Raymond Chang, Williams College

Chemistry in the Atmosphere

Self Assessment B



1

The regions of the atmosphere, in order of increasing distance from the earth's surface, are
A)mesosphere, troposphere, stratosphere, thermosphere
B)troposphere, stratosphere, mesosphere, thermosphere
C)stratosphere, troposphere, thermosphere, mesosphere
D)troposphere, stratosphere, thermosphere, mesosphere
E)thermosphere, mesosphere, stratosphere, troposphere
2

Which of the following reactions would be an example of nitrogen fixation?
A)N2(g) + O2(g) ----> 2 NO(g)
B)2 NO(g) ----> N2(g) + O2(g)
C)2 NH3(g) ----> N2(g) + 3 H2(g)
D)2 NO(g) + O2(g) ----> 2 NO2(g)
E)B and D.
3

The Aurora Borealis is due to
A)disruptions of the ozone layer.
B)relaxation of excited oxygen atoms and ionized N2 molecules.
C)the production of NO.
D)lightening.
4

Ozone protects us from ultraviolet light by:
A)reflecting the light from the ozone layer.
B)reacting with oxygen atoms to form O2.
C)dissociating into O2 and oxygen atoms.
D)None of the above.
5

The depletion of ozone is particularly serious at the 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.
6

Volcanoes
A)produce about two-thirds of the sulfur in the air.
B)are involved in the production of sulfuric acid "aerosols", which persist above the troposphere.
C)produce localized areas of lower temperature.
D)All of the above.
E)None of the above.
7

Which of the following is not a greenhouse gas?
A)nitrogen
B)nitrous oxide
C)CFC's
D)methane
E)water vapor
8

Which of the following is not a source of CO2?
A)fermentation of sugar
B)oxidation of carbohydrates
C)decomposition of carbonates by heat or acid
D)photosynthesis
9

An increase in carbon dioxide concentration causes atmospheric warming because
A)the energy trapped by excitation of molecular vibrations is released and some returns to earth.
B)the greater vibrational amplitude of the carbon dioxide causes heating of atmospheric oxygen molecules.
C)the carbon dioxide molecules dissociate.
D)None of the above.
10

Which of the following oxides would not react with water to form an acidic solution?
A)SO3
B)CO2
C)BaO
D)NO2