Question 1

Which product of the ultraviolet decomposition of CFCs acts as the catalyst for ozone decomposition?

Accepted Answer

A) Oxygen atoms 
B) Chlorine atoms 
C) Fluorine atoms 
D) Hydrogen atoms 
A) Oxygen atoms 
B) Chlorine atoms 
C) Fluorine atoms 
D) Hydrogen atoms

Question 2

Light behaves like

Accepted Answer

A) a particle. 
B) a wave. 
C) both a particle and a wave. 
D) neither a particle nor a wave. 
A) a particle. 
B) a wave. 
C) both a particle and a wave. 
D) neither a particle nor a wave.

Question 3

During the Antarctic spring,ozone is destroyed at a greater rate than it is formed

Accepted Answer

A) on the surface of atmospheric ice crystals. 
B) in a process that is catalytic. 
C) in polar stratospheric clouds. 
D) All of these choices are correct 
A) on the surface of atmospheric ice crystals. 
B) in a process that is catalytic. 
C) in polar stratospheric clouds. 
D) All of these choices are correct

Question 4

The structure of ozone most closely resembles a

Accepted Answer

A) linear molecule with different lengths of chemical bonds,for example,   
B) linear molecule with the same length of chemical bonds,for example,   
C) bent molecule with different lengths of chemical bonds,for example,   
D) bent molecule with the same length of chemical bonds,for example,   
A) linear molecule with different lengths of chemical bonds,for example,   
B) linear molecule with the same length of chemical bonds,for example,   
C) bent molecule with different lengths of chemical bonds,for example,   
D) bent molecule with the same length of chemical bonds,for example,

Question 5

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 6

Which compounds are used in mineral-based sunscreens?

Accepted Answer

A) ZnO and TiO2 
B) ZnO and CdS 
C) TiO2 and SiO2 
D) CdS and SiO2 
A) ZnO and TiO2 
B) ZnO and CdS 
C) TiO2 and SiO2 
D) CdS and SiO2

Question 7

Free radicals are

Accepted Answer

A) highly reactive chemical species. 
B) species with unpaired electrons. 
C) species such as H• and •OH. 
D) All of these correctly describe free radicals 
A) highly reactive chemical species. 
B) species with unpaired electrons. 
C) species such as H• and •OH. 
D) All of these correctly describe free radicals

Question 8

As the ozone hole gets more pronounced,with time,one expects the incidence of skin cancer to

Accepted Answer

A) decrease worldwide. 
B) increase worldwide. 
C) increase in the northern hemisphere and decrease in the southern hemisphere. 
D) decrease in the northern hemisphere and decrease in the northern hemisphere. 
A) decrease worldwide. 
B) increase worldwide. 
C) increase in the northern hemisphere and decrease in the southern hemisphere. 
D) decrease in the northern hemisphere and decrease in the northern hemisphere.

Question 9

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 10

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 11

The ozone hole is most prominent on the Earth over

Accepted Answer

A) North America. 
B) Europe. 
C) Africa. 
D) Antarctica. 
A) North America. 
B) Europe. 
C) Africa. 
D) Antarctica.

Question 12

Halons differ from CFCs in that the atoms of ________ replace some ________ atoms.

Accepted Answer

A) iodine;chlorine 
B) hydrogen;chlorine 
C) bromine;chlorine 
D) silicon;carbon 
A) iodine;chlorine 
B) hydrogen;chlorine 
C) bromine;chlorine 
D) silicon;carbon

Question 13

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 14

Which color in the rainbow has the shortest wavelength?

Accepted Answer

A) Orange 
B) Red 
C) Yellow 
D) Blue 
A) Orange 
B) Red 
C) Yellow 
D) Blue

Question 15

Which of the following compounds is useful for putting out fires and does not deplete stratospheric ozone concentrations?

Accepted Answer

A) Halon-1211 
B) CFC-113 
C) HFCs 
D) Methyl Bromide 
A) Halon-1211 
B) CFC-113 
C) HFCs 
D) Methyl Bromide

Question 16

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 17

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 18

When only one pair of shared electrons is involved in a covalent bond,the linkage is called a bond.

Accepted Answer

A) triple 
B) single 
C) double 
D) resonant 
A) triple 
B) single 
C) double 
D) resonant

Question 19

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 20

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 France. 
C) smaller than Iceland. 
D) about the same size as Canada. 
A) about as large as North America. 
B) about the same size as France. 
C) smaller than Iceland. 
D) about the same size as Canada.

Which product of the ultraviolet decomposition of CFCs acts as the catalyst for ozone decomposition?

Light behaves like

During the Antarctic spring,ozone is destroyed at a greater rate than it is formed

The structure of ozone most closely resembles a

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

Which compounds are used in mineral-based sunscreens?

Free radicals are

As the ozone hole gets more pronounced,with time,one expects the incidence of skin cancer to

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

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

The ozone hole is most prominent on the Earth over

Halons differ from CFCs in that the atoms of replace some atoms.

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

Which color in the rainbow has the shortest wavelength?

Which of the following compounds is useful for putting out fires and does not deplete stratospheric ozone concentrations?

Which Lewis structure for formaldehyde (CH₂O) is correct?

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

When only one pair of shared electrons is involved in a covalent bond,the linkage is called a bond.

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?

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

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Exam 3: Radiation From the Sun

Which product of the ultraviolet decomposition of CFCs acts as the catalyst for ozone decomposition?

Light behaves like

During the Antarctic spring,ozone is destroyed at a greater rate than it is formed

The structure of ozone most closely resembles a

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

Which compounds are used in mineral-based sunscreens?

Free radicals are

As the ozone hole gets more pronounced,with time,one expects the incidence of skin cancer to

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

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

The ozone hole is most prominent on the Earth over

Halons differ from CFCs in that the atoms of ________ replace some ________ atoms.

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

Which color in the rainbow has the shortest wavelength?

Which of the following compounds is useful for putting out fires and does not deplete stratospheric ozone concentrations?

Which Lewis structure for formaldehyde (CH2O) is correct?

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

When only one pair of shared electrons is involved in a covalent bond,the linkage is called a bond.

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?

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

Portable Electronics: the Periodic Table in the Palm of Your Hand

The Air We Breathe

Climate Change

Energy From Combustion

Energy From Alternative Sources

Energy Storage

Water Everywhere: A Most Precious Resource

The World of Polymers and Plastics

Brewing and Chewing

Nutrition

Health Medicine

Genes and Life

Who Killed Drthompson a Forensic Mystery

Filters

Halons differ from CFCs in that the atoms of replace some atoms.

Which Lewis structure for formaldehyde (CH₂O) is correct?