Question 1

The dividing line between the troposphere and stratosphere is known as the .

Accepted Answer

A)  stratopause 
B)  mesopause 
C)  mesosphere 
D)  thermosphere 
E)  tropopause 
A)  stratopause 
B)  mesopause 
C)  mesosphere 
D)  thermosphere 
E)  tropopause

Question 2

Select the substance that is thought to be partially responsible for depleting the concentration of ozone in the stratosphere.

Accepted Answer

A)  He 
B)  O2  
C)  CFCl3  
D)  N2  
E)  CO2 
A)  He 
B)  O2  
C)  CFCl3  
D)  N2  
E)  CO2

Question 3

The fourth most abundant component of dry air is .

Accepted Answer

The answer of The fourth most abundant component of dry...

Question 4

The mole fraction of oxygen in dry air near sea level is 0.20948. The concentration of oxygen is
Molecules per liter, assuming an atmospheric pressure of 739 torr and a temperature of 29.5°C.

Accepted Answer

A)  5.07 × 1022 
B)  6.23 
C)  0.00819 
D)  4.93 × 1021 
E)  3.75 × 1024 
A)  5.07 × 1022 
B)  6.23 
C)  0.00819 
D)  4.93 × 1021 
E)  3.75 × 1024

Question 5

The partial pressure of a component in a gas mixture is the product of its mole fraction and the total mixture pressure.

Accepted Answer

A) True 
 B)False

Question 6

Which gaseous sulfur compound combines with water to form the principal acidic constituent of acid rain?

Accepted Answer

A)  SO3  
B)  SO2  
C)  SO 
D)  H2SO4  
E)  H2S 
A)  SO3  
B)  SO2  
C)  SO 
D)  H2SO4  
E)  H2S

Question 7

Acid rain typically has a pH of about .

Accepted Answer

A)  7 
B)  5 
C)  4 
D)  2 
E)  1 
A)  7 
B)  5 
C)  4 
D)  2 
E)  1

Question 8

The contribution of sulfur to acid rain is via the production of .

Accepted Answer

The answer of The contribution of sulfur to acid rain...

Question 9

The sterilizing action of chlorine in water is due to what substance _?

Accepted Answer

A)  Cl2  
B)  Cl-  
C)  HCl 
D)  H+  
E)  HClO 
A)  Cl2  
B)  Cl-  
C)  HCl 
D)  H+  
E)  HClO

Question 10

Which of the following is not a stage in water treatment?

Accepted Answer

A)  settling 
B)  coarse filtration 
C)  distillation 
D)  aeration 
E)  chlorination 
A)  settling 
B)  coarse filtration 
C)  distillation 
D)  aeration 
E)  chlorination

Question 11

The concentration of which greenhouse gas has increased steadily over the last few decades ?

Accepted Answer

A)  O2  
B)  CO 
C)  H2O 
D)  CO2  
E)  H2O2 
A)  O2  
B)  CO 
C)  H2O 
D)  CO2  
E)  H2O2

Question 12

Carbon dioxide contributes to atmospheric warming by .

Accepted Answer

A)  absorbing radiation emitted from the surface of the earth preventing its loss to space 
B)  absorbing incoming radiation from the sun and converting it to heat 
C)  increasing the index of refraction of the atmosphere so that infrared radiation from the sun is refracted to the surface of the earth where it is converted to heat 
D)  reducing the concentration of CO in the atmosphere. 
E)  undergoing exothermic reactions extensively in the atmosphere 
A)  absorbing radiation emitted from the surface of the earth preventing its loss to space 
B)  absorbing incoming radiation from the sun and converting it to heat 
C)  increasing the index of refraction of the atmosphere so that infrared radiation from the sun is refracted to the surface of the earth where it is converted to heat 
D)  reducing the concentration of CO in the atmosphere. 
E)  undergoing exothermic reactions extensively in the atmosphere

Question 13

In the past, CFCs were not used in .

Accepted Answer

A)  dry cleaning 
B)  spray cans 
C)  plastic manufacturing 
D)  refrigerators 
E)  air conditioners 
A)  dry cleaning 
B)  spray cans 
C)  plastic manufacturing 
D)  refrigerators 
E)  air conditioners

Question 14

As one gains altitude in the atmosphere, based on the ionization energies shown below, which sequence of mole fractions is the correct one?

Accepted Answer

A)  N2 > O2 > O > NO 
B)  N2 > O > O2 > NO 
C)  N2 > N > NO > O2 
D)  NO > O2 > O > N2 
E)  All will be equal. 
A)  N2 > O2 > O > NO 
B)  N2 > O > O2 > NO 
C)  N2 > N > NO > O2 
D)  NO > O2 > O > N2 
E)  All will be equal.

Question 15

The greenhouse effect of methane far exceeds the effect of carbon dioxide.

Accepted Answer

A) True 
 B)False

Question 16

Why does ozone not form in high concentrations in the atmosphere above 50 km?

Accepted Answer

A)  Light of the required wavelength is not available at those altitudes. 
B)  The pressure is too high. 
C)  Insufficient oxygen is available. 
D)  Insufficient molecules exist for removal of excess energy from ozone upon its formation. 
E)  Atomic oxygen concentration is too low at high altitudes. 
A)  Light of the required wavelength is not available at those altitudes. 
B)  The pressure is too high. 
C)  Insufficient oxygen is available. 
D)  Insufficient molecules exist for removal of excess energy from ozone upon its formation. 
E)  Atomic oxygen concentration is too low at high altitudes.

Question 17

What is the percentage of freshwater on planet Earth ?

Accepted Answer

A)  2.1% 
B)  0.6% 
C)  97% 
D)  100% 
E)  2.8% 
A)  2.1% 
B)  0.6% 
C)  97% 
D)  100% 
E)  2.8%

Question 18

Of the following, only does not result in the formation of acid rain.

Accepted Answer

A)  nitrogen monoxide 
B)  methane 
C)  carbon dioxide 
D)  sulfur dioxide 
E)  nitrogen dioxide 
A)  nitrogen monoxide 
B)  methane 
C)  carbon dioxide 
D)  sulfur dioxide 
E)  nitrogen dioxide

Question 19

Polar stratospheric clouds aid in the destruction of stratospheric ozone in two ways. What are these ways?

Accepted Answer

They remove NO₂, thus stopping

Question 20

CFC stands for .

Accepted Answer

A)  chlorinated freon compound 
B)  carbofluoro compound 
C)  carbonated fluorine compound 
D)  caustic fluorine carbohydrate 
E)  chlorofluorocarbon 
A)  chlorinated freon compound 
B)  carbofluoro compound 
C)  carbonated fluorine compound 
D)  caustic fluorine carbohydrate 
E)  chlorofluorocarbon

Exam 18: Chemistry of the Environment

The dividing line between the troposphere and stratosphere is known as the .

Select the substance that is thought to be partially responsible for depleting the concentration of ozone in the stratosphere.

The fourth most abundant component of dry air is .

The mole fraction of oxygen in dry air near sea level is 0.20948. The concentration of oxygen is Molecules per liter, assuming an atmospheric pressure of 739 torr and a temperature of 29.5°C.

The partial pressure of a component in a gas mixture is the product of its mole fraction and the total mixture pressure.

Which gaseous sulfur compound combines with water to form the principal acidic constituent of acid rain?

Acid rain typically has a pH of about .

The contribution of sulfur to acid rain is via the production of .

The sterilizing action of chlorine in water is due to what substance _?

Which of the following is not a stage in water treatment?

The concentration of which greenhouse gas has increased steadily over the last few decades ?

Carbon dioxide contributes to atmospheric warming by .

In the past, CFCs were not used in .

As one gains altitude in the atmosphere, based on the ionization energies shown below, which sequence of mole fractions is the correct one?

The greenhouse effect of methane far exceeds the effect of carbon dioxide.

Why does ozone not form in high concentrations in the atmosphere above 50 km?

What is the percentage of freshwater on planet Earth ?

Of the following, only does not result in the formation of acid rain.

Polar stratospheric clouds aid in the destruction of stratospheric ozone in two ways. What are these ways?

CFC stands for .

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Gases

Intermolecular Forces, Liquids, and Solids

Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Equilibria

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Chemistry of Coordination Compounds

The Chemistry of Life: Organic and Biological Chemistry

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As one gains altitude in the atmosphere, based on the ionization energies shown below, which sequence of mole fractions is the correct one? $As one gains altitude in the atmosphere, based on the ionization energies shown below, which sequence of mole fractions is the correct one?$