Question 1

What is the role of polar stratospheric clouds (PSCs)on the destruction of ozone?

Accepted Answer

A) The cold clouds react with ozone to make oxygen molecules and oxygen atoms. 
B) Chemical reactions occur on the clouds that convert molecules that do no damage to those that deplete ozone. 
C) They play no role. 
D) The clouds are made of chlorine atoms from CFCs. 
A) The cold clouds react with ozone to make oxygen molecules and oxygen atoms. 
B) Chemical reactions occur on the clouds that convert molecules that do no damage to those that deplete ozone. 
C) They play no role. 
D) The clouds are made of chlorine atoms from CFCs.

Question 2

Which region of the ultraviolet spectrum is absorbed least by the atmosphere?

Accepted Answer

A) UV-A 
B) UV-B 
C) UV-C 
D) They are all absorbed approximately equally. 
A) UV-A 
B) UV-B 
C) UV-C 
D) They are all absorbed approximately equally.

Question 3

Elements in the same column of the periodic table in the Groups labeled A tend to have similar chemical and physical properties because they have the same number of

Accepted Answer

A) valence electrons. 
B) protons. 
C) protons plus electrons. 
D) protons plus neutrons. 
A) valence electrons. 
B) protons. 
C) protons plus electrons. 
D) protons plus neutrons.

Question 4

It is the _____ electrons that account for many of the chemical and physical properties of elements.

Accepted Answer

A) innermost 
B) intermediate 
C) outermost 
D) transitional 
A) innermost 
B) intermediate 
C) outermost 
D) transitional

Question 5

Which contributes to the ozone hole?

Accepted Answer

A) automobile exhaust 
B) chlorofluorocarbons (CFCs) 
C) loss of Northern forests 
D) All of these choices are correct. 
A) automobile exhaust 
B) chlorofluorocarbons (CFCs) 
C) loss of Northern forests 
D) All of these choices are correct.

Question 6

CFCs were originally developed to replace which refrigerant compound(s)?

Accepted Answer

A) ice 
B) HCFCs 
C) ammonia and sulfur dioxide 
D) propane 
A) ice 
B) HCFCs 
C) ammonia and sulfur dioxide 
D) propane

Question 7

Which Lewis structure for formaldehyde (CH2O)is correct?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 8

Chlorofluorocarbons rise to the stratosphere and

Accepted Answer

A) react directly with stratospheric ozone to destroy it. 
B) interact with UV energy to produce free radicals that destroy ozone. 
C) interact with UV energy to produce free radicals that react with oxygen to create ozone. 
D) react with free radicals to remove carbon dioxide. 
A) react directly with stratospheric ozone to destroy it. 
B) interact with UV energy to produce free radicals that destroy ozone. 
C) interact with UV energy to produce free radicals that react with oxygen to create ozone. 
D) react with free radicals to remove carbon dioxide.

Question 9

The nucleus of an atom contains

Accepted Answer

A) electrons and protons only. 
B) protons only. 
C) electrons,protons,and neutrons. 
D) protons and neutrons only. 
A) electrons and protons only. 
B) protons only. 
C) electrons,protons,and neutrons. 
D) protons and neutrons only.

Question 10

HCFCs have been developed to replace CFCs as refrigerants.Which property of these new compounds makes them environmentally superior to CFCs?

Accepted Answer

A) Greater reactivity leads to decomposition at elevations below the stratospheric ozone concentration maximum. 
B) Lower reactivity makes them stable even in the intense ultraviolet light in the stratosphere. 
C) Their higher molecular weight prevents them from reaching the stratosphere. 
D) They do not contain chlorine. 
A) Greater reactivity leads to decomposition at elevations below the stratospheric ozone concentration maximum. 
B) Lower reactivity makes them stable even in the intense ultraviolet light in the stratosphere. 
C) Their higher molecular weight prevents them from reaching the stratosphere. 
D) They do not contain chlorine.

Question 11

DNA,the genetic material of living organisms,is damaged by light in the

Accepted Answer

A) visible region of the spectrum. 
B) ultraviolet region,especially below a wavelength of 320 nm. 
C) ultraviolet region,especially above a wavelength of 340 nm. 
D) infrared region of the spectrum. 
A) visible region of the spectrum. 
B) ultraviolet region,especially below a wavelength of 320 nm. 
C) ultraviolet region,especially above a wavelength of 340 nm. 
D) infrared region of the spectrum.

Question 12

The morning newspaper reports a UV Index Forecast of 6.5.What precautions,if any should a fair skinned person take?

Accepted Answer

A) None. 
B) Only sunglasses and maybe a hat is enough. 
C) Reduce exposure between 10 a.m.and 4 p.m.in addition to SPF 15+ sunscreen. 
D) All precautions must be taken;this is an extreme UV day. 
A) None. 
B) Only sunglasses and maybe a hat is enough. 
C) Reduce exposure between 10 a.m.and 4 p.m.in addition to SPF 15+ sunscreen. 
D) All precautions must be taken;this is an extreme UV day.

Question 13

Isotopes of an element have the same number of ______,but different numbers of ______.

Accepted Answer

A) electrons;protons 
B) protons;neutrons 
C) neutrons;protons 
D) protons;electrons 
A) electrons;protons 
B) protons;neutrons 
C) neutrons;protons 
D) protons;electrons

Question 14

Yellow light has a wavelength of 580 nm.What is the frequency of this light?

Accepted Answer

A) 2.39 × 10¯19 s¯1 
B) 1.80 × 10¯7 s¯1 
C) 5.17 × 105 s¯1 
D) 5.17 × 1014 s¯1 
A) 2.39 × 10¯19 s¯1 
B) 1.80 × 10¯7 s¯1 
C) 5.17 × 105 s¯1 
D) 5.17 × 1014 s¯1

Question 15

Ozone in our atmosphere is important because it

Accepted Answer

A) absorbs some UV radiation. 
B) helps trees grow. 
C) reacts with excess CO2. 
D) reflects IR radiation. 
A) absorbs some UV radiation. 
B) helps trees grow. 
C) reacts with excess CO2. 
D) reflects IR radiation.

Question 16

When it reaches its largest size,the ozone hole over the Antarctic is

Accepted Answer

A) about as large as North America. 
B) about the same size as Texas. 
C) smaller than Rhode Island. 
D) about the same size as California. 
A) about as large as North America. 
B) about the same size as Texas. 
C) smaller than Rhode Island. 
D) about the same size as California.

Question 17

HCFCs are a temporary solution to the problem of ozone depletion and will be replaced over the next 20 years by which class of compounds?

Accepted Answer

A) HFCs 
B) CFCs 
C) halons 
D) HFBCs 
A) HFCs 
B) CFCs 
C) halons 
D) HFBCs

Question 18

WUKF FM transmits at 93.5 MHz.What is the wavelength of the electromagnetic radiation that carries the station's signal?

Accepted Answer

A) 6.42 × 10¯9 m 
B) 3.21 m 
C) 3.21 × 106 m 
D) 3.12 × 1015 m 
A) 6.42 × 10¯9 m 
B) 3.21 m 
C) 3.21 × 106 m 
D) 3.12 × 1015 m

Question 19

HFCs may be used to replace CFCs.Which compound is a HFC?

Accepted Answer

A) CH2Cl CCl2F 
B) CH2FCl 
C) CF3CH2F 
D) CHClF2 
A) CH2Cl CCl2F 
B) CH2FCl 
C) CF3CH2F 
D) CHClF2

Question 20

The goal of the Montreal Protocol in 1987 was to

Accepted Answer

A) reduce the amount of new production of chlorofluorocarbons in developed countries. 
B) recycle existing chlorofluorocarbons rather than release them into the air. 
C) encourage research into substitutes for chlorofluorocarbons. 
D) All of these choices are correct. 
A) reduce the amount of new production of chlorofluorocarbons in developed countries. 
B) recycle existing chlorofluorocarbons rather than release them into the air. 
C) encourage research into substitutes for chlorofluorocarbons. 
D) All of these choices are correct.

What is the role of polar stratospheric clouds (PSCs)on the destruction of ozone?

Which region of the ultraviolet spectrum is absorbed least by the atmosphere?

Elements in the same column of the periodic table in the Groups labeled A tend to have similar chemical and physical properties because they have the same number of

It is the _____ electrons that account for many of the chemical and physical properties of elements.

Which contributes to the ozone hole?

CFCs were originally developed to replace which refrigerant compound(s)?

Which Lewis structure for formaldehyde (CH₂O)is correct?

Chlorofluorocarbons rise to the stratosphere and

The nucleus of an atom contains

HCFCs have been developed to replace CFCs as refrigerants.Which property of these new compounds makes them environmentally superior to CFCs?

DNA,the genetic material of living organisms,is damaged by light in the

The morning newspaper reports a UV Index Forecast of 6.5.What precautions,if any should a fair skinned person take?

Isotopes of an element have the same number of ,but different numbers of .

Yellow light has a wavelength of 580 nm.What is the frequency of this light?

Ozone in our atmosphere is important because it

When it reaches its largest size,the ozone hole over the Antarctic is

HCFCs are a temporary solution to the problem of ozone depletion and will be replaced over the next 20 years by which class of compounds?

WUKF FM transmits at 93.5 MHz.What is the wavelength of the electromagnetic radiation that carries the station's signal?

HFCs may be used to replace CFCs.Which compound is a HFC?

The goal of the Montreal Protocol in 1987 was to

The Air We Breathe

The Chemistry of Global Climate Change

Energy From Combustion

Water for Life

Neutralizing the Threat of Acid Rain

The Fires of Nuclear Fission

Energy From Electron Transfer

The World of Polymers and Plastics

Manipulating Molecules and Designing Drugs

Nutrition: Food for Thought

Genetic Engineering and the Molecules of Life

Filters

Exam 2: Protecting the Ozone Layer

What is the role of polar stratospheric clouds (PSCs)on the destruction of ozone?

Which region of the ultraviolet spectrum is absorbed least by the atmosphere?

Elements in the same column of the periodic table in the Groups labeled A tend to have similar chemical and physical properties because they have the same number of

It is the _____ electrons that account for many of the chemical and physical properties of elements.

Which contributes to the ozone hole?

CFCs were originally developed to replace which refrigerant compound(s)?

Which Lewis structure for formaldehyde (CH2O)is correct?

Chlorofluorocarbons rise to the stratosphere and

The nucleus of an atom contains

HCFCs have been developed to replace CFCs as refrigerants.Which property of these new compounds makes them environmentally superior to CFCs?

DNA,the genetic material of living organisms,is damaged by light in the

The morning newspaper reports a UV Index Forecast of 6.5.What precautions,if any should a fair skinned person take?

Isotopes of an element have the same number of ______,but different numbers of ______.

Yellow light has a wavelength of 580 nm.What is the frequency of this light?

Ozone in our atmosphere is important because it

When it reaches its largest size,the ozone hole over the Antarctic is

HCFCs are a temporary solution to the problem of ozone depletion and will be replaced over the next 20 years by which class of compounds?

WUKF FM transmits at 93.5 MHz.What is the wavelength of the electromagnetic radiation that carries the station's signal?

HFCs may be used to replace CFCs.Which compound is a HFC?

The goal of the Montreal Protocol in 1987 was to

The Air We Breathe

The Chemistry of Global Climate Change

Energy From Combustion

Water for Life

Neutralizing the Threat of Acid Rain

The Fires of Nuclear Fission

Energy From Electron Transfer

The World of Polymers and Plastics

Manipulating Molecules and Designing Drugs

Nutrition: Food for Thought

Genetic Engineering and the Molecules of Life

Filters

Which Lewis structure for formaldehyde (CH₂O)is correct?

Isotopes of an element have the same number of ,but different numbers of .