Question 1

Which choice includes only polyatomic substances?

Accepted Answer

A) boxes I and II only 
B) boxes I and IV only 
C) boxes II and III only 
D) boxes II,III,and IV only 
A) boxes I and II only 
B) boxes I and IV only 
C) boxes II and III only 
D) boxes II,III,and IV only

Question 2

The O2 molecule breaks apart at lower wavelengths than the O3 molecule.What is the main reason for this? (Hint: Draw the Lewis structures)

Accepted Answer

A) O2 is more reactive than O3 
B) O3 is more reactive than O2 
C) The average bond in O3 is shorter and stronger than that of O2 
D) The average bond in O2 is shorter and stronger than that of O3 
A) O2 is more reactive than O3 
B) O3 is more reactive than O2 
C) The average bond in O3 is shorter and stronger than that of O2 
D) The average bond in O2 is shorter and stronger than that of O3

Question 3

The correct Lewis structure for HCl is:

Accepted Answer

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

Question 4

Single bonds,double bonds,and triple bonds

Accepted Answer

A) have 1,2,and 3 shared electrons,respectively. 
B) have 2,4,and 6 shared electrons,respectively. 
C) have 3,6,and 9 shared electrons,respectively. 
D) are only possible between carbon atoms. 
A) have 1,2,and 3 shared electrons,respectively. 
B) have 2,4,and 6 shared electrons,respectively. 
C) have 3,6,and 9 shared electrons,respectively. 
D) are only possible between carbon atoms.

Question 5

Two isotopes of a particular element differ from one another by the number of

Accepted Answer

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

Question 6

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 7

The mass number of an isotope of an element is the

Accepted Answer

A) sum of the number of its protons and electrons. 
B) number of its protons. 
C) sum of the number of its protons and neutrons. 
D) sum of the number of its protons,neutrons,and electrons. 
A) sum of the number of its protons and electrons. 
B) number of its protons. 
C) sum of the number of its protons and neutrons. 
D) sum of the number of its protons,neutrons,and electrons.

Question 8

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 9

The speed of light in air

Accepted Answer

A) depends only on the frequency of the light. 
B) depends only on the wavelength of light. 
C) is independent of the wavelength and frequency of light. 
D) depends on both the wavelength and the frequency of light. 
A) depends only on the frequency of the light. 
B) depends only on the wavelength of light. 
C) is independent of the wavelength and frequency of light. 
D) depends on both the wavelength and the frequency of light.

Question 10

The wavelength of light in the visible range is

Accepted Answer

A) about the size of an atom of carbon. 
B) intermediate between the size of an animal cell and a virus. 
C) about the diameter of a CD. 
D) intermediate between the size of an animal cell and the diameter of a CD. 
A) about the size of an atom of carbon. 
B) intermediate between the size of an animal cell and a virus. 
C) about the diameter of a CD. 
D) intermediate between the size of an animal cell and the diameter of a CD.

Question 11

The two chemical bonds and geometry of water are best represented by:

Accepted Answer

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

Question 12

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 13

In the atmosphere over the Earth,where is the region with the highest concentration of ozone?

Accepted Answer

A) troposphere 
B) biosphere 
C) mesosphere 
D) stratosphere 
A) troposphere 
B) biosphere 
C) mesosphere 
D) stratosphere

Question 14

By approximately what percentage did global production of CFCs fall from 1987 to 2000?

Accepted Answer

A) 13% 
B) 44% 
C) 88% 
D) 1100% 
A) 13% 
B) 44% 
C) 88% 
D) 1100%

Question 15

Increasing wavelength of light goes in this order:

Accepted Answer

A) ultraviolet > visible > infrared. 
B) visible > infrared > ultraviolet. 
C) infrared > visible > ultraviolet. 
D) ultraviolet > infrared > visible. 
A) ultraviolet > visible > infrared. 
B) visible > infrared > ultraviolet. 
C) infrared > visible > ultraviolet. 
D) ultraviolet > infrared > visible.

Question 16

In reference to waves,frequency is the

Accepted Answer

A) number of waves passing a fixed point in one second. 
B) height of the wave. 
C) distance between successive peaks in a wave. 
D) distance between a peak in a wave to the next trough. 
A) number of waves passing a fixed point in one second. 
B) height of the wave. 
C) distance between successive peaks in a wave. 
D) distance between a peak in a wave to the next trough.

Question 17

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 18

From 1974 to 2002,the chance that a white male would be diagnosed with melanoma skin cancer rose by

Accepted Answer

A) 18%. 
B) 31%. 
C) 100%. 
D) 225%. 
A) 18%. 
B) 31%. 
C) 100%. 
D) 225%.

Question 19

The atomic number is the

Accepted Answer

A) same as the mass number of an atom. 
B) number of protons in a nucleus. 
C) number of protons and neutrons in a nucleus. 
D) number of neutrons in a nucleus. 
A) same as the mass number of an atom. 
B) number of protons in a nucleus. 
C) number of protons and neutrons in a nucleus. 
D) number of neutrons in a nucleus.

Question 20

How many protons,neutrons,and electrons are in a neutral atom of 64Cu (atomic number = 29)?

Accepted Answer

A) Protons = 64,neutrons = 29,electrons = 29 
B) Protons = 35,neutrons = 29,electrons = 35 
C) Protons = 29,neutrons = 64,electrons = 35 
D) Protons = 29,neutrons = 35,electrons = 29 
A) Protons = 64,neutrons = 29,electrons = 29 
B) Protons = 35,neutrons = 29,electrons = 35 
C) Protons = 29,neutrons = 64,electrons = 35 
D) Protons = 29,neutrons = 35,electrons = 29

Which choice includes only polyatomic substances?

The O₂ molecule breaks apart at lower wavelengths than the O₃ molecule.What is the main reason for this? (Hint: Draw the Lewis structures)

The correct Lewis structure for HCl is:

Single bonds,double bonds,and triple bonds

Two isotopes of a particular element differ from one another by the number of

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

The mass number of an isotope of an element is the

Free radicals are

The speed of light in air

The wavelength of light in the visible range is

The two chemical bonds and geometry of water are best represented by:

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

In the atmosphere over the Earth,where is the region with the highest concentration of ozone?

By approximately what percentage did global production of CFCs fall from 1987 to 2000?

Increasing wavelength of light goes in this order:

In reference to waves,frequency is the

The structure of ozone most closely resembles a

From 1974 to 2002,the chance that a white male would be diagnosed with melanoma skin cancer rose by

The atomic number is the

How many protons,neutrons,and electrons are in a neutral atom of ⁶⁴Cu (atomic number = 29)?

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

Which choice includes only polyatomic substances?

The O2 molecule breaks apart at lower wavelengths than the O3 molecule.What is the main reason for this? (Hint: Draw the Lewis structures)

The correct Lewis structure for HCl is:

Single bonds,double bonds,and triple bonds

Two isotopes of a particular element differ from one another by the number of

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

The mass number of an isotope of an element is the

Free radicals are

The speed of light in air

The wavelength of light in the visible range is

The two chemical bonds and geometry of water are best represented by:

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

In the atmosphere over the Earth,where is the region with the highest concentration of ozone?

By approximately what percentage did global production of CFCs fall from 1987 to 2000?

Increasing wavelength of light goes in this order:

In reference to waves,frequency is the

The structure of ozone most closely resembles a

From 1974 to 2002,the chance that a white male would be diagnosed with melanoma skin cancer rose by

The atomic number is the

How many protons,neutrons,and electrons are in a neutral atom of 64Cu (atomic number = 29)?

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

The O₂ molecule breaks apart at lower wavelengths than the O₃ molecule.What is the main reason for this? (Hint: Draw the Lewis structures)

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

How many protons,neutrons,and electrons are in a neutral atom of ⁶⁴Cu (atomic number = 29)?