Question 1

Which of these substances is \are  not important in the life-cycle of plants?
I. N2
II. O2
III. H2O
IV. CO2

Accepted Answer

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

Question 2

Which of these pollutants is produced primarily by forest fires, power plants, industries and automobile exhaust?

Accepted Answer

A) SO2 
B) PM-2.5 
C) CO 
D) O3 
E) Pb 
A) SO2 
B) PM-2.5 
C) CO 
D) O3 
E) Pb B

Question 3

The temperature scale used in gas law problems_________.

Accepted Answer

A) must be Celsius 
B) must be Kelvin 
C) must be Fahrenheit 
D) does not matter 
A) must be Celsius 
B) must be Kelvin 
C) must be Fahrenheit 
D) does not matter B

Question 4

What is the correct conversion factor between atmospheres and torr?

Accepted Answer

A) 1 atm = 1 torr 
B) 1 atm = 760 torr 
C) 760 atm = 1 torr 
D) 1 atm = 29.92 torr 
A) 1 atm = 1 torr 
B) 1 atm = 760 torr 
C) 760 atm = 1 torr 
D) 1 atm = 29.92 torr

Question 5

Which of these is the correct ordering of the regions of the atmosphere from lowest altitude to highest altitude?

Accepted Answer

A) ionosphere < mesosphere < troposphere < stratosphere 
B) stratosphere < ionosphere < troposphere < mesosphere 
C) troposphere < stratosphere < mesosphere < ionosphere 
D) troposphere < mesosphere < stratosphere < ionosphere 
E) mesosphere < troposphere < stratosphere < ionosphere 
A) ionosphere < mesosphere < troposphere < stratosphere 
B) stratosphere < ionosphere < troposphere < mesosphere 
C) troposphere < stratosphere < mesosphere < ionosphere 
D) troposphere < mesosphere < stratosphere < ionosphere 
E) mesosphere < troposphere < stratosphere < ionosphere

Question 6

Which of these pollutants gives smog its characteristic brown color?

Accepted Answer

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

Question 7

Which of these processes is represented by the equation?
​
O3 + UV light → O + O2

Accepted Answer

A) UV absorption 
B) Combustion 
C) Photosynthesis 
D) Respiration 
E) Nitrogen fixation 
A) UV absorption 
B) Combustion 
C) Photosynthesis 
D) Respiration 
E) Nitrogen fixation

Question 8

A gas contained in a piston has a pressure of 100. torr and a volume of 1.0 L. Determine the pressure of the gas if it is compressed to a volume of 0.75 L at the same temperature .

Accepted Answer

A) 25 torr 
B) 55 torr 
C) 75 torr 
D) 133 torr 
E) 150 torr 
A) 25 torr 
B) 55 torr 
C) 75 torr 
D) 133 torr 
E) 150 torr

Question 9

Which of these laws describes the relationship between pressure and volume at a constant temperature?

Accepted Answer

A) Ideal Gas law 
B) Boyle's law 
C) Charles's law 
D) Avogadro's law 
E) Graham's law 
A) Ideal Gas law 
B) Boyle's law 
C) Charles's law 
D) Avogadro's law 
E) Graham's law

Question 10

18 ppm equals

Accepted Answer

A) 0.18% 
B) 0.018% 
C) 0.0018% 
D) 0.00018% 
A) 0.18% 
B) 0.018% 
C) 0.0018% 
D) 0.00018%

Question 11

Rank these gases in order of their abundance in the atmosphere (least to greatest).
(O2, N2, Ar, Ne, CO2)

Accepted Answer

A) O2 2 2 
B) N2 2 2 
C) Ar 2 2 2 
D) Ne 2 2 2 
E) CO2 2 2 
A) O2 2 2 
B) N2 2 2 
C) Ar 2 2 2 
D) Ne 2 2 2 
E) CO2 2 2

Question 12

Which of these gases is \are  not a part (either as a reactant or as a product)of the biochemical reaction known as respiration?
I. N2
II. O2
III. H2O
IV. CO2

Accepted Answer

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

Question 13

Which statement is correct?

Accepted Answer

A) UV-A is more harmful to humans than UV-B. 
B) UV-B is more harmful to humans than UV-A. 
C) UV-A and UV-B are equally harmful to humans. 
D) Neither UV-A or UV-B is harmful to humans. 
A) UV-A is more harmful to humans than UV-B. 
B) UV-B is more harmful to humans than UV-A. 
C) UV-A and UV-B are equally harmful to humans. 
D) Neither UV-A or UV-B is harmful to humans.

Question 14

The volume of 350. mL of gas at 25.0 ° C is decreased to 125 mL at constant pressure. What is the final temperature of the gas?

Accepted Answer

A) − 167 ° C 
B) − 126 ° C 
C) 70 ° C 
D) 89 ° C 
E) 147 ° C 
A) − 167 ° C 
B) − 126 ° C 
C) 70 ° C 
D) 89 ° C 
E) 147 ° C

Question 15

A sample of oxygen with a volume of V is contained in a sealed syringe with a movable piston. If the pressure of the sample were halved and the absolute temperature tripled, what would be the new volume of the gas?

Accepted Answer

A) 6.0 V 
B) 5.0 V 
C) 3.5 V 
D) 1.5 V 
E) 0.5 V 
A) 6.0 V 
B) 5.0 V 
C) 3.5 V 
D) 1.5 V 
E) 0.5 V

Question 16

According to Boyle's law, if the pressure of a gas is decreased by a factor of five then the ____ of a gas is ____ by a factor of ____.

Accepted Answer

A) volume, increased, five 
B) volume, decreased, 1\5th 
C) volume, increased, 15 
D) temperature, increased, five 
E) temperature, decreased, 1\5th 
A) volume, increased, five 
B) volume, decreased, 1\5th 
C) volume, increased, 15 
D) temperature, increased, five 
E) temperature, decreased, 1\5th

Question 17

Which of these statements about pressure is \are  incorrect ?
I. Pressure is directly proportional to the number of gas molecules.
II. Pressure is directly proportional to temperature.
III. Pressure is directly proportional to volume.

Accepted Answer

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

Question 18

Which of these is the correct representation of Boyle's law?

Accepted Answer

A) PV = k 
B) V\T = k 
C) P\V = k 
D) V\P = k 
E) VT = k 
A) PV = k 
B) V\T = k 
C) P\V = k 
D) V\P = k 
E) VT = k

Question 19

Which region of the Earth's atmosphere supports all earth-bound life?

Accepted Answer

A) Firstosphere 
B) Mesosphere 
C) Stratosphere 
D) Troposphere 
E) Ionosphere 
A) Firstosphere 
B) Mesosphere 
C) Stratosphere 
D) Troposphere 
E) Ionosphere

Question 20

Which of these gases is broken down by bacteria in the soil and used directly by plants?

Accepted Answer

A) N2 
B) O2 
C) Ar 
D) He 
E) CO2 
A) N2 
B) O2 
C) Ar 
D) He 
E) CO2

Which of these substances is \are not important in the life-cycle of plants? I. N₂ II. O₂ III. H₂O IV. CO₂

Which of these pollutants is produced primarily by forest fires, power plants, industries and automobile exhaust?

The temperature scale used in gas law problems_________.

What is the correct conversion factor between atmospheres and torr?

Which of these is the correct ordering of the regions of the atmosphere from lowest altitude to highest altitude?

Which of these pollutants gives smog its characteristic brown color?

Which of these processes is represented by the equation? O₃ + UV light → O + O₂

A gas contained in a piston has a pressure of 100. torr and a volume of 1.0 L. Determine the pressure of the gas if it is compressed to a volume of 0.75 L at the same temperature .

Which of these laws describes the relationship between pressure and volume at a constant temperature?

18 ppm equals

Rank these gases in order of their abundance in the atmosphere (least to greatest). (O₂, N₂, Ar, Ne, CO₂)

Which of these gases is \are not a part (either as a reactant or as a product)of the biochemical reaction known as respiration? I. N₂ II. O₂ III. H₂O IV. CO₂

Which statement is correct?

The volume of 350. mL of gas at 25.0 ° C is decreased to 125 mL at constant pressure. What is the final temperature of the gas?

A sample of oxygen with a volume of V is contained in a sealed syringe with a movable piston. If the pressure of the sample were halved and the absolute temperature tripled, what would be the new volume of the gas?

According to Boyle's law, if the pressure of a gas is decreased by a factor of five then the of a gas is by a factor of .

Which of these statements about pressure is \are incorrect ? I. Pressure is directly proportional to the number of gas molecules. II. Pressure is directly proportional to temperature. III. Pressure is directly proportional to volume.

Which of these is the correct representation of Boyle's law?

Which region of the Earth's atmosphere supports all earth-bound life?

Which of these gases is broken down by bacteria in the soil and used directly by plants?

Molecular Reasons

The Chemists Toolbox

Atoms and Elements

Molecules, Compounds, and Chemical Reactions

Chemical Bonding

Organic Chemistry

Light and Color

Nuclear Chemistry

Energy for Today

Energy for Tomorrow: Solar and Other Renewable Energy Sources

The Liquids and Solids Around Us: Especially Water

Acids and Bases: the Molecules Responsible for Sour and Bitter

Oxidation and Reduction

The Chemistry of Household Products

Biochemistry and Biotechnology

Drugs and Medicine: Healing, Helping, and Hurting

The Chemistry of Food

Nanotechnology

Filters

Exam 11: The Air Around Us

Which of these substances is \are not important in the life-cycle of plants? I. N2 II. O2 III. H2O IV. CO2

Which of these pollutants is produced primarily by forest fires, power plants, industries and automobile exhaust?

The temperature scale used in gas law problems_________.

What is the correct conversion factor between atmospheres and torr?

Which of these is the correct ordering of the regions of the atmosphere from lowest altitude to highest altitude?

Which of these pollutants gives smog its characteristic brown color?

Which of these processes is represented by the equation? ​ O3 + UV light → O + O2

A gas contained in a piston has a pressure of 100. torr and a volume of 1.0 L. Determine the pressure of the gas if it is compressed to a volume of 0.75 L at the same temperature .

Which of these laws describes the relationship between pressure and volume at a constant temperature?

18 ppm equals

Rank these gases in order of their abundance in the atmosphere (least to greatest). (O2, N2, Ar, Ne, CO2)

Which of these gases is \are not a part (either as a reactant or as a product)of the biochemical reaction known as respiration? I. N2 II. O2 III. H2O IV. CO2

Which statement is correct?

The volume of 350. mL of gas at 25.0 ° C is decreased to 125 mL at constant pressure. What is the final temperature of the gas?

A sample of oxygen with a volume of V is contained in a sealed syringe with a movable piston. If the pressure of the sample were halved and the absolute temperature tripled, what would be the new volume of the gas?

According to Boyle's law, if the pressure of a gas is decreased by a factor of five then the ____ of a gas is ____ by a factor of ____.

Which of these statements about pressure is \are incorrect ? I. Pressure is directly proportional to the number of gas molecules. II. Pressure is directly proportional to temperature. III. Pressure is directly proportional to volume.

Which of these is the correct representation of Boyle's law?

Which region of the Earth's atmosphere supports all earth-bound life?

Which of these gases is broken down by bacteria in the soil and used directly by plants?

Molecular Reasons

The Chemists Toolbox

Atoms and Elements

Molecules, Compounds, and Chemical Reactions

Chemical Bonding

Organic Chemistry

Light and Color

Nuclear Chemistry

Energy for Today

Energy for Tomorrow: Solar and Other Renewable Energy Sources

The Liquids and Solids Around Us: Especially Water

Acids and Bases: the Molecules Responsible for Sour and Bitter

Oxidation and Reduction

The Chemistry of Household Products

Biochemistry and Biotechnology

Drugs and Medicine: Healing, Helping, and Hurting

The Chemistry of Food

Nanotechnology

Filters

Which of these substances is \are not important in the life-cycle of plants? I. N₂ II. O₂ III. H₂O IV. CO₂

Which of these processes is represented by the equation? O₃ + UV light → O + O₂

Rank these gases in order of their abundance in the atmosphere (least to greatest). (O₂, N₂, Ar, Ne, CO₂)

Which of these gases is \are not a part (either as a reactant or as a product)of the biochemical reaction known as respiration? I. N₂ II. O₂ III. H₂O IV. CO₂

According to Boyle's law, if the pressure of a gas is decreased by a factor of five then the of a gas is by a factor of .