Question 1

Which type of radiation is the most energetic?

Accepted Answer

A)  UV-A 
B)  UV-B 
C)  UV-C 
D)  visible 
A)  UV-A 
B)  UV-B 
C)  UV-C 
D)  visible C

Question 2

Consider the following sequence of four reactions.   Answer the following question using the number of the appropriate reaction. More than one reaction may be applicable to a given question. You need only enter one reaction.
-In order to attain a steady state one reaction must counteract another in a cycle such as that shown. A reaction which could be used to consume ozone is reaction_______.

Accepted Answer

3
4
three
four

Question 3

UV-A radiation has a shorter wavelength than UV-B radiation.

Accepted Answer

A) True 
 B)False  False

Question 4

Why must the ozone layer in the stratosphere be protected?

Accepted Answer

A)  ozone poisons incoming, unwanted aliens 
B)  ozone absorbs some incoming ultraviolet light 
C)  ozone burns up incoming meteorites 
D)  ozone prevents oxygen from escaping the earth 
A)  ozone poisons incoming, unwanted aliens 
B)  ozone absorbs some incoming ultraviolet light 
C)  ozone burns up incoming meteorites 
D)  ozone prevents oxygen from escaping the earth

Question 5

Chlorofluorocarbons, such as CCl2F2, can cause problems in the upper atmosphere by destroying

Accepted Answer

A)  nitrogen oxides. 
B)  oxygen. 
C)  ozone. 
D)  polynuclear hydrocarbons. 
A)  nitrogen oxides. 
B)  oxygen. 
C)  ozone. 
D)  polynuclear hydrocarbons.

Question 6

Consider the following sequence of four reactions.   Answer the following question using the number of the appropriate reaction. More than one reaction may be applicable to a given question. You need only enter one reaction.
-The reaction that is identical to a reaction in the cycle by which CFCs destroy ozone is reaction________.

Accepted Answer

The answer of Consider the following sequence of four reactions....

Question 7

Consider the following sequence of four reactions.   Answer the following question using the number of the appropriate reaction. More than one reaction may be applicable to a given question. You need only enter one reaction.
-In order to attain a steady state one reaction must counteract another in a cycle such as that shown. The reaction which could be used to replace depleted ozone is reaction_______.

Accepted Answer

The answer of Consider the following sequence of four reactions....

Question 8

Which molecule is used as a replacement for CFC?

Accepted Answer

A)  HFC-134a 
B)  HCFC-123 
C)  HFC-152a 
D)  all of the above 
A)  HFC-134a 
B)  HCFC-123 
C)  HFC-152a 
D)  all of the above

Question 9

Decreasing ozone concentrations are only observed over Antarctica.

Accepted Answer

A) True 
 B)False

Question 10

Which type of radiation is effective at damaging DNA?

Accepted Answer

A)  UV-A 
B)  UV-B 
C)  UV-C 
D)  visible 
A)  UV-A 
B)  UV-B 
C)  UV-C 
D)  visible

Question 11

Consider the following sequence of four reactions.   Answer the following question using the number of the appropriate reaction. More than one reaction may be applicable to a given question. You need only enter one reaction.
-A reaction that would serve to decrease the amount of oxygen is reaction ________.

Accepted Answer

The answer of Consider the following sequence of four reactions....

Question 12

The following sequence of reactions describes the destruction of ozone in the troposphere.

Accepted Answer

A) True 
 B)False

Question 13

More UV-A radiation reaches the Earth's surface than either UV-B or UV-C.

Accepted Answer

A) True 
 B)False

Question 14

Consider the following sequence of four reactions.   Answer the following question using the number of the appropriate reaction. More than one reaction may be applicable to a given question. You need only enter one reaction.
-The reaction requiring a photon of the longest wavelength is reaction ______.

Accepted Answer

The answer of Consider the following sequence of four reactions....

Question 15

In the past, which of the following was not a source of atmospheric CFCs?

Accepted Answer

A)  air-conditioning 
B)  aerosol sprays 
C)  refrigerants 
D)  blown foams 
E)  All of the above have been sources of atmospheric CFCs. 
A)  air-conditioning 
B)  aerosol sprays 
C)  refrigerants 
D)  blown foams 
E)  All of the above have been sources of atmospheric CFCs.

Question 16

Which molecule absorbs UV-B radiation?

Accepted Answer

A)  O2 
B)  O3 
C)  CO2 
D)  NO2 
A)  O2 
B)  O3 
C)  CO2 
D)  NO2

Question 17

What chemical bond is broken by a photon of light in a typical CFC molecule?

Accepted Answer

A)  C-H 
B)  Cl-Cl 
C)  H-Cl 
D)  C-Cl 
A)  C-H 
B)  Cl-Cl 
C)  H-Cl 
D)  C-Cl

Question 18

What type of radiation is absorbed by molecular oxygen in the stratosphere?

Accepted Answer

A)  UV-A 
B)  UV-B 
C)  UV-C 
D)  visible 
A)  UV-A 
B)  UV-B 
C)  UV-C 
D)  visible

Question 19

Consider the following sequence of reactions.   The reason that low concentrations of CFCs can destroy major amounts of ozone is due to the production of a the reactive Cl species in this sequence.

Accepted Answer

A) True 
 B)False

Question 20

In a photochemical reaction,

Accepted Answer

A)  the chemical reaction is energized by light. 
B)  nitrogen dioxide must be present. 
C)  ozone is always formed. 
D)  none of the above 
A)  the chemical reaction is energized by light. 
B)  nitrogen dioxide must be present. 
C)  ozone is always formed. 
D)  none of the above

Which type of radiation is the most energetic?

UV-A radiation has a shorter wavelength than UV-B radiation.

Why must the ozone layer in the stratosphere be protected?

Chlorofluorocarbons, such as CCl₂F₂, can cause problems in the upper atmosphere by destroying

Which molecule is used as a replacement for CFC?

Decreasing ozone concentrations are only observed over Antarctica.

Which type of radiation is effective at damaging DNA?

The following sequence of reactions describes the destruction of ozone in the troposphere.

More UV-A radiation reaches the Earth's surface than either UV-B or UV-C.

In the past, which of the following was not a source of atmospheric CFCs?

Which molecule absorbs UV-B radiation?

What chemical bond is broken by a photon of light in a typical CFC molecule?

What type of radiation is absorbed by molecular oxygen in the stratosphere?

Consider the following sequence of reactions. The reason that low concentrations of CFCs can destroy major amounts of ozone is due to the production of a the reactive Cl species in this sequence.

In a photochemical reaction,

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Exam 7: Chlorofluorocarbons and the Ozone Layer

Which type of radiation is the most energetic?

UV-A radiation has a shorter wavelength than UV-B radiation.

Why must the ozone layer in the stratosphere be protected?

Chlorofluorocarbons, such as CCl2F2, can cause problems in the upper atmosphere by destroying

Which molecule is used as a replacement for CFC?

Decreasing ozone concentrations are only observed over Antarctica.

Which type of radiation is effective at damaging DNA?

The following sequence of reactions describes the destruction of ozone in the troposphere.

More UV-A radiation reaches the Earth's surface than either UV-B or UV-C.

In the past, which of the following was not a source of atmospheric CFCs?

Which molecule absorbs UV-B radiation?

What chemical bond is broken by a photon of light in a typical CFC molecule?

What type of radiation is absorbed by molecular oxygen in the stratosphere?

Consider the following sequence of reactions. The reason that low concentrations of CFCs can destroy major amounts of ozone is due to the production of a the reactive Cl species in this sequence.

In a photochemical reaction,

Living in a World of Chemistry

The Chemical View of Matter

Atoms and the Periodic Table

The Air We Breathe

Chemical Bonding and States of Matter

Carbon Dioxide and the Greenhouse Effect

Chemical Reactivity: Chemicals in Action

Acid-Base Reactions

Oxidation-Reduction Reactions

Water, Water Everywhere but Not a Drop to Drink

Energy and Hydrocarbons

Nuclear Changes and Nuclear Power

Organic Chemicals and Polymers

The Chemistry of Life

Nutrition: the Basis of Healthy Living

Chemistry and Medicine

The Chemistry of Useful Materials

Feeding the World

Filters

Chlorofluorocarbons, such as CCl₂F₂, can cause problems in the upper atmosphere by destroying