Question 1

What is the primary component of an exhaled breath?

Accepted Answer

A) N2 
B) O2 
C) CO2 
D) H2O 
A) N2 
B) O2 
C) CO2 
D) H2O

Question 2

Which of the following is a pure substance?

Accepted Answer

A) Lemonade 
B) Concrete 
C) Gasoline 
D) Silver wire 
A) Lemonade 
B) Concrete 
C) Gasoline 
D) Silver wire

Question 3

Based on its name,which carbon compound contains the fewest carbon atoms?

Accepted Answer

A) ethanol 
B) methane 
C) chlorobutane 
D) propyl alcohol 
A) ethanol 
B) methane 
C) chlorobutane 
D) propyl alcohol

Question 4

Which square(s)contain(s)only an element?

Accepted Answer

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

Question 5

Which pollutant is found both indoors and outdoors,but it most likely to be toxic indoors?

Accepted Answer

A) CO 
B) O3 
C) NO2 
D) SO2 
A) CO 
B) O3 
C) NO2 
D) SO2

Question 6

A(n)__________ is a fixed number of atoms held together by chemical bonds in a certain spatial arrangement.

Accepted Answer

A) element 
B) ion 
C) molecule 
D) mixture 
A) element 
B) ion 
C) molecule 
D) mixture

Question 7

Which is the following incorrectly represents a combustion reaction?

Accepted Answer

A) 2 CH4 + 3 O2 → 2 CO2 + 2 H2O 
B) S8 + 8 O2 → 8 SO2 
C) N2 + 2 O2 → 2 NO2 
D) C3H8 + O2 → 3 CO2 
A) 2 CH4 + 3 O2 → 2 CO2 + 2 H2O 
B) S8 + 8 O2 → 8 SO2 
C) N2 + 2 O2 → 2 NO2 
D) C3H8 + O2 → 3 CO2

Question 8

Which square(s)contain(s)only one or more compounds?

Accepted Answer

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

Question 9

Critique the statement: "Air pollution is an unavoidable by-product of an industrialized society-the more modern we become the more air pollution we will have."

Accepted Answer

A) This is a reasonable statement since burning fossil fuels is necessary for industrialization and unavoidably produces pollutants. 
B) Although burning fossil fuels does produce air pollutants,technology may prevent these pollutants from increasing in the atmosphere as we become more industrialized. 
C) Air pollution is not inevitable if we could raise the temperature at which fossil fuels are burned. 
D) Burning fossil fuels does not have to produce potential pollutants,but it does because of the unwillingness of government and industry to spend additional money. 
A) This is a reasonable statement since burning fossil fuels is necessary for industrialization and unavoidably produces pollutants. 
B) Although burning fossil fuels does produce air pollutants,technology may prevent these pollutants from increasing in the atmosphere as we become more industrialized. 
C) Air pollution is not inevitable if we could raise the temperature at which fossil fuels are burned. 
D) Burning fossil fuels does not have to produce potential pollutants,but it does because of the unwillingness of government and industry to spend additional money.

Question 10

The chemist,at about the time of the American Civil War,given the greatest credit for developing the most common way of arranging the elements,thus leading to the Periodic Table of today,is

Accepted Answer

A) Einstein. 
B) Pasteur. 
C) Mendeleev. 
D) Galileo. 
A) Einstein. 
B) Pasteur. 
C) Mendeleev. 
D) Galileo.

Question 11

The burning of coal produces sulfur dioxide,SO2,a pollutant that slowly reacts in air to form SO3.Sulfur trioxide dissolves into airborne water droplets to form a very corrosive solution of sulfuric acid.Which is a product of burning coal that hastens the transformation of sulfur dioxide into sulfur trioxide?

Accepted Answer

A) carbon dioxide 
B) carbon monoxide 
C) nitrogen dioxide 
D) particles of ash 
A) carbon dioxide 
B) carbon monoxide 
C) nitrogen dioxide 
D) particles of ash

Question 12

Which differentiates a compound from a mixture of two or more elements?

Accepted Answer

A) The elements in a compound may be present in varying proportions. 
B) A compound does not exhibit the individual properties of the elements of which it is composed. 
C) A compound is made up of only one element. 
D) A compound cannot be made up of more than two elements. 
A) The elements in a compound may be present in varying proportions. 
B) A compound does not exhibit the individual properties of the elements of which it is composed. 
C) A compound is made up of only one element. 
D) A compound cannot be made up of more than two elements.

Question 13

Which of the following is the correct name for SF6?

Accepted Answer

A) Monosulfur Hexafluoride 
B) Sulfur Hexafluorite 
C) Sulfur Fluoride 
D) Sulfur Hexafluoride 
A) Monosulfur Hexafluoride 
B) Sulfur Hexafluorite 
C) Sulfur Fluoride 
D) Sulfur Hexafluoride

Question 14

P2O5 is the chemical formula for

Accepted Answer

A) pentoxygen diphosphide. 
B) diphosphorus pentoxide. 
C) dioxygen pentaphosphide. 
D) monophosphorus pentoxide. 
A) pentoxygen diphosphide. 
B) diphosphorus pentoxide. 
C) dioxygen pentaphosphide. 
D) monophosphorus pentoxide.

Question 15

Which diagram(s)best represent(s)only molecules?

Accepted Answer

A) I only 
B) II only 
C) III only 
D) I and II only 
E) IV only 
A) I only 
B) II only 
C) III only 
D) I and II only 
E) IV only

Question 16

Which squares contain mixtures?

Accepted Answer

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

Question 17

The highest (or uppermost)layer of our atmosphere is the

Accepted Answer

A) troposphere. 
B) ozone layer. 
C) stratosphere. 
D) mesosphere. 
A) troposphere. 
B) ozone layer. 
C) stratosphere. 
D) mesosphere.

Question 18

The ________ concentration in the air over the desert differs dramatically from that in the air in the tropical rainforest.

Accepted Answer

A) N2 
B) O2 
C) CO2 
D) H2O 
A) N2 
B) O2 
C) CO2 
D) H2O

Question 19

Which is the balanced chemical equation for the reaction of nitrogen (N2)with oxygen (O2)to form NO?

Accepted Answer

A) 2 NO → N2 + O2 
B) N2 + O2 → NO 
C) N2 + O2 → 2 NO 
D) NO → N2 + O2 
A) 2 NO → N2 + O2 
B) N2 + O2 → NO 
C) N2 + O2 → 2 NO 
D) NO → N2 + O2

Question 20

Which symbols represent only elements that are metals?

Accepted Answer

A) X and Z 
B) X and Q 
C) P and L 
D) X,R,P,and Q 
A) X and Z 
B) X and Q 
C) P and L 
D) X,R,P,and Q

What is the primary component of an exhaled breath?

Which of the following is a pure substance?

Based on its name,which carbon compound contains the fewest carbon atoms?

Which square(s)contain(s)only an element?

Which pollutant is found both indoors and outdoors,but it most likely to be toxic indoors?

A(n)__________ is a fixed number of atoms held together by chemical bonds in a certain spatial arrangement.

Which is the following incorrectly represents a combustion reaction?

Which square(s)contain(s)only one or more compounds?

Critique the statement: "Air pollution is an unavoidable by-product of an industrialized society-the more modern we become the more air pollution we will have."

The chemist,at about the time of the American Civil War,given the greatest credit for developing the most common way of arranging the elements,thus leading to the Periodic Table of today,is

Which differentiates a compound from a mixture of two or more elements?

Which of the following is the correct name for SF₆?

P₂O₅ is the chemical formula for

Which diagram(s)best represent(s)only molecules?

Which squares contain mixtures?

The highest (or uppermost)layer of our atmosphere is the

The ________ concentration in the air over the desert differs dramatically from that in the air in the tropical rainforest.

Which is the balanced chemical equation for the reaction of nitrogen (N₂)with oxygen (O₂)to form NO?

Which symbols represent only elements that are metals?

Protecting the Ozone Layer

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 1: The Air We Breathe

What is the primary component of an exhaled breath?

Which of the following is a pure substance?

Based on its name,which carbon compound contains the fewest carbon atoms?

Which square(s)contain(s)only an element?

Which pollutant is found both indoors and outdoors,but it most likely to be toxic indoors?

A(n)__________ is a fixed number of atoms held together by chemical bonds in a certain spatial arrangement.

Which is the following incorrectly represents a combustion reaction?

Which square(s)contain(s)only one or more compounds?

Critique the statement: "Air pollution is an unavoidable by-product of an industrialized society-the more modern we become the more air pollution we will have."

The chemist,at about the time of the American Civil War,given the greatest credit for developing the most common way of arranging the elements,thus leading to the Periodic Table of today,is

Which differentiates a compound from a mixture of two or more elements?

Which of the following is the correct name for SF6?

P2O5 is the chemical formula for

Which diagram(s)best represent(s)only molecules?

Which squares contain mixtures?

The highest (or uppermost)layer of our atmosphere is the

The ________ concentration in the air over the desert differs dramatically from that in the air in the tropical rainforest.

Which is the balanced chemical equation for the reaction of nitrogen (N2)with oxygen (O2)to form NO?

Which symbols represent only elements that are metals?

Protecting the Ozone Layer

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 of the following is the correct name for SF₆?

P₂O₅ is the chemical formula for

Which is the balanced chemical equation for the reaction of nitrogen (N₂)with oxygen (O₂)to form NO?