Question 1

Due to a highway accident,150 L of concentrated hydrochloric acid (12.0 M) is released into a lake containing 5.0 × 105 m3 of water.If the pH of this lake was 7.0 prior to the accident,what is the pH of the lake following the accident?

Accepted Answer

A)  5.44
B)  8.56
C)  8.44
D)  5.56
E)  2.44F) B) and E)
G) B) and D)

Question 2

Ozone protects us from ultraviolet light by

Accepted Answer

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

Question 3

Which of the following is emitted into the atmosphere when a volcano erupts?

Accepted Answer

A)  H2S
B)  N2
C)  HCl
D)  sulfuric acid aerosol
E)  All of the answers are correct.F) A) and E)
G) A) and B)

Question 4

What is the layer of the atmosphere called which is the uppermost layer of the atmosphere and where the increase in temperature in this region is the result of the bombardment of molecular oxygen and nitrogen and atomic species by energetic particles,such as electrons and protons,from the sun?

Accepted Answer

A)  outer atmosphere
B)  mesosphere
C)  thermosphere
D)  troposphere
E)  stratosphereF) None of the above
G) A) and B)

Question 5

_______________ is the major mechanism by which molecular oxygen is regenerated from carbon dioxide and water.

Accepted Answer

The answer of _______________ is the major mechanism by which...

Question 6

The Earth's core consists mainly of

Accepted Answer

A)  Ni.
B)  O.
C)  Al.
D)  Si.
E)  Fe.F) C) and E)
G) B) and C)

Question 7

When radon decays it produces Po-214 and Po-218.This means that

Accepted Answer

A)  a gas (radon) is converted into a solid (Po) .
B)  radon decays into nonhazardous products.
C)  after the decay there is no danger due to radioactivity.
D)  the polonium can be swept out of the basement..
E)  None of the.F) A) and B)
G) C) and E)

Question 8

Which of the following areas of the atmosphere is closest to Earth's surface?

Accepted Answer

A)  troposphere
B)  stratosphere
C)  mesosphere
D)  thermosphere
E)  ionosphereF) B) and D)
G) C) and D)

Question 9

Why do molecules become IR-active?

Accepted Answer

A)  Because they are in constant motion.
B)  Because they can absorb IR radiation (a photon of a specific wavelength in the IR region) because their dipole moments constantly change as the bond lengths change.
C)  Because they vibrate at low temperatures.
D)  Because their net dipole is zero.
E)  Because they are very close together.F) A) and C)
G) A) and E)

Question 10

Acid rain is precipitation having a pH that is

Accepted Answer

A)  above 7.
B)  below 5.5.
C)  below 7.
D)  above 8.6.
E)  above 10.F) A) and C)
G) A) and B)

Question 11

The main effect of the biosphere on the chemistry of the Earth's crust has been to

Accepted Answer

A)  create a reducing atmosphere.
B)  create an oxidizing atmosphere.
C)  increase the relative humidity.
D)  decrease the relative humidity.
E)  increase the level of atmospheric carbon dioxide.F) A) and D)
G) A) and E)

Question 12

Which one of the following would slow the rate of increase of atmospheric CO2?

Accepted Answer

A)  building and operating more coal-fired power plants
B)  more use of catalytic converters in cars to produce complete combustion
C)  use of hydrogen fuel produced using solar or nuclear energy
D)  conversion of nuclear power plants to methane-burning power plants
E)  clearing and burning the tropical rain forestsF) D) and E)
G) All of the above

Question 13

Which of the following is not a source of CO2?

Accepted Answer

A)  fermentation of sugar
B)  oxidation of carbohydrates
C)  decomposition of carbonates by heat or acid
D)  photosynthesisE) C) and D)
F) A) and B)

Question 14

What are the secondary pollutants from automobile exhaust?

Accepted Answer

The answer of What are the secondary pollutants from automobile...

Question 15

What is the name of the chemical with a very foul smell that is a preservative used to preserve the body of dead people?

Accepted Answer

A)  formaldehyde
B)  hydrogen peroxide
C)  hydrochloric acid
D)  formic acid
E)  potassium permanganateF) A) and B)
G) B) and C)

Question 16

What is defined as the conversion of molecular nitrogen into nitrogen compounds?

Accepted Answer

A)  nitrogen fixation
B)  nitrogen conversion
C)  nitrogenation
D)  nitrogen turnover
E)  nitrogen cycleF) A) and B)
G) B) and D)

Question 17

The Aurora Borealis is due to

Accepted Answer

A)  disruptions of the ozone layer.
B)  relaxation of excited oxygen atoms and ionized N2 molecules.
C)  the production of NO.D.lightning.D) All of the above
E) None of the above

Question 18

Ozone is formed in the atmosphere by the combination of oxygen molecules with

Accepted Answer

A)  chlorofluorocarbons.
B)  hydrocarbons.
C)  oxygen atoms.
D)  CO2.
E)  ClO.F) A) and E)
G) D) and E)

Question 19

What is the name given to the violent eruptions on the surface of the sun resulting in the ejection of myriad electrons and protons into space?

Accepted Answer

A)  solar vulcanizations
B)  solar lighting
C)  stellar explosions
D)  solar explosions
E)  solar flaresF) A) and E)
G) A) and D)

Question 20

What is readily liquefied,relatively inert,nontoxic,noncombustible,and volatile and has been used as a coolant in refrigerators and air conditioners but is harmful to the ozone layer in the stratosphere?

Accepted Answer

A)  antifreeze
B)  SO2
C)  ammonia
D)  0.444 m
E)  FreonF) B) and D)
G) C) and E)

Exam 21: Environmental Chemistry

Which of the following areas of the atmosphere is closest to Earth's surface?

Correct AnswerverifiedShow Answer

Which of the following is not a source of CO2?

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The Aurora Borealis is due to

Correct AnswerverifiedShow Answer

Which one of the following would slow the rate of increase of atmospheric CO2?

Correct AnswerverifiedShow Answer

The main effect of the biosphere on the chemistry of the Earth's crust has been to

Correct AnswerverifiedShow Answer

What is readily liquefied,relatively inert,nontoxic,noncombustible,and volatile and has been used as a coolant in refrigerators and air conditioners but is harmful to the ozone layer in the stratosphere?

Correct AnswerverifiedShow Answer

Acid rain is precipitation having a pH that is

Correct AnswerverifiedShow Answer

Ozone protects us from ultraviolet light by

Correct AnswerverifiedShow Answer

What is defined as the conversion of molecular nitrogen into nitrogen compounds?

Correct AnswerverifiedShow Answer

The Earth's core consists mainly of

Correct AnswerverifiedShow Answer

What are the secondary pollutants from automobile exhaust?

Correct AnswerverifiedShow Answer

What is the name of the chemical with a very foul smell that is a preservative used to preserve the body of dead people?

Correct AnswerverifiedShow Answer

What is the layer of the atmosphere called which is the uppermost layer of the atmosphere and where the increase in temperature in this region is the result of the bombardment of molecular oxygen and nitrogen and atomic species by energetic particles,such as electrons and protons,from the sun?

Correct AnswerverifiedShow Answer

What is the name given to the violent eruptions on the surface of the sun resulting in the ejection of myriad electrons and protons into space?

Correct AnswerverifiedShow Answer

Which of the following is emitted into the atmosphere when a volcano erupts?

Correct AnswerverifiedShow Answer

When radon decays it produces Po-214 and Po-218.This means that

Correct AnswerverifiedShow Answer

Ozone is formed in the atmosphere by the combination of oxygen molecules with

Correct AnswerverifiedShow Answer

Due to a highway accident,150 L of concentrated hydrochloric acid (12.0 M) is released into a lake containing 5.0 × 105 m3 of water.If the pH of this lake was 7.0 prior to the accident,what is the pH of the lake following the accident?

Correct AnswerverifiedShow Answer

Why do molecules become IR-active?

Correct AnswerverifiedShow Answer

_______________ is the major mechanism by which molecular oxygen is regenerated from carbon dioxide and water.

Correct AnswerverifiedShow Answer

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Which of the following is not a source of CO₂?

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Which one of the following would slow the rate of increase of atmospheric CO₂?

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Due to a highway accident,150 L of concentrated hydrochloric acid (12.0 M) is released into a lake containing 5.0 × 10⁵ m³ of water.If the pH of this lake was 7.0 prior to the accident,what is the pH of the lake following the accident?

Correct Answer
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Correct Answer
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Correct Answer
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