Deck 11: The Air Around Us

Question 1

Which of these is not a possible unit of pressure?

A) in. Hg
B) psi
C) torr
D) mm Hg
E) lb/s

Answer 1

lb/s

Question 2

A sample of acetylene gas occupies a volume of 47.2 L under a pressure of 1.63 atm at 25 ° C. What will be the volume of the gas if the pressure is decreased to 0.961 atm at 25 ° C?

A) 27.8 L
B) 30.0 L
C) 32.3 L
D) 47.8 L
E) 80.1 L

Answer 2

80.1 L

Question 3

A balloon contains 14.0 L of air at a pressure of 760 torr. What will be the volume of the air when the balloon is taken to a region with a pressure of 981 torr at constant temperature ?

A) 1.3 L
B) 8.2 L
C) 10.8 L
D) 14.0 L
E) 18 L

Answer 3

10.8 L

Question 4

Which of these statements concerning pressure and weather is/are correct ?
I. Low pressure in a region tends to draw in storms.
II. High pressure in a region usually indicates clear weather.
III. Changes in pressure from region to region are responsible for winds.

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

Question 5

Which of these is not a possible unit of pressure?

A) g/mL
B) lb/in²
C) Pa
D) N/m²
E) mm Hg

Question 6

The layer of air that surrounds the earth is known as the _____.

A) crust
B) pressure
C) atmosphere
D) gas constant
E) biosphere

Question 7

For an ideal gas sample, the following graph could represent a plot of  _____.

A) Boyle's law, V vs. T at a given constant P.
B) Charles's law, P vs. T at a given constant V.
C) Boyle's law, P vs. V at a given constant T.
D) Dalton's law, PV vs. P at a given constant T.
E) Avogadro's law, P vs. n at a constant T.

Question 8

A sample of  the gas  Freon in an air conditioner has a volume of 325 L and a pressure of 96,300 Pa at 20 ° C. What will be the pressure of Freon when the volume is 975 L at 20 ° C?

A) 1975 Pa
B) 3.2 × 10⁴ Pa
C) 2.89 × 10⁵ Pa
D) 3.1 × 10⁷ Pa
E) 9.4 × 10⁷ Pa

Question 9

The unit of pressure is _____.

A) kN/m²
B) N/mm²
C) kN/mm²
D) N/m²
E) N/m³

Question 10

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

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

Question 11

What causes pressure?

A) A sudden decrease in temperature
B) The collisions of gas molecules with other gas molecules
C) Collisions of gas molecules with their surrounding surfaces
D) All of these
E) None of these

Question 12

What is the correct conversion factor between atmospheres and torr?

A) 1 atm = 1 torr
B) 1 atm = 760 torr
C) 760 atm = 1 torr
D) 1 atm = 29.92 torr
E) 29.22 atm = 1 torr

Question 13

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.

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

Question 14

Which of the following is the formula for the chemical compound found in airbags?

A) Na₃N
B) NaN₃
C) Na₂O
D) NaO₂
E) NaN₂

Question 15

According to Boyle's law, if the pressure of a gas is increased by a factor of 4, then the _____ of the gas is _____ by a factor of _____.

A) volume; increased; 4
B) volume; decreased; 4
C) volume; increased; 14
D) temperature; increased; 4
E) temperature; decreased; 4

Question 16

A gas cylinder with a movable  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 constant temperature.

A) 25 torr
B) 55 torr
C) 75 torr
D) 133.33 torr
E) 150 torr

Question 17

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

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

Question 18

According to Boyle's law, if the pressure of a gas is decreased by a factor of 5, then the _____ of the gas is _____ by a factor of _____.

A) volume; increased; five
B) volume; decreased;  1/5^th
C) volume; increased; 15
D) temperature; increased; 5
E) temperature; decreased; 1/5^th

Question 19

Which of these is not a possible unit of pressure?

A) mm Hg
B) psi
C) torr
D) atm
E) J/s

Question 20

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

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

Question 21

The noble gas argon accounts for approximately _____ of the earth's atmosphere.

A) 10%
B) 0.9%
C) 0.1%
D) 0.01%
E) 0.001%

Question 22

Which of these gases is the most abundant in the earth's atmosphere?

A) O₂
B) N₂
C) H₂
D) He
E) CO₂

Question 23

A sample of nitrogen at pressure P is contained in a sealed syringe with a movable piston. If the volume of the sample were doubled and the absolute temperature tripled, the new pressure of the gas would be _____.

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

Question 24

Rank the following gases in the increasing  order of their abundance in the atmosphere. ​
(O₂, N₂, H₂, He, CO₂)

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

Question 25

A sample of oxygen with a volume 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?

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

Question 26

A sample of gas occupies 30.0 L at 0 ° C and 1 atm. What temperature will the same gas have in a 22.5 L container with a pressure of 3.5 atm?

A) 212 ° C
B) 284.2 ° C
C) 386 ° C
D) 443.64 ° C
E) 516 ° C

Question 27

A sample of carbon dioxide at 10.0 ° C has a volume of 300.0 mL at 760 torr. What is the volume of the gas at 30.0 ° C and 760 torr?

A) 275 mL
B) 280.5 mL
C) 321.2 mL
D) 755 mL
E) 900 mL

Question 28

The volume of 350.0 mL of gas at 25.0 ° C is decreased to 125 mL at constant pressure. What is the final temperature of the gas?

A) − 167 ° C
B) − 126 ° C
C) 70 ° C
D) 8.9 ° C
E) 147 ° C

Question 29

What is the approximate composition of the earth's atmosphere?

A) 80% oxygen and 20% nitrogen
B) 78% nitrogen and 21% oxygen
C) 50% nitrogen and 50% oxygen
D) 100% oxygen
E) 100% nitrogen

Question 30

Rank the following gases in the increasing order of their abundance in the atmosphere. ​
(O₂, N₂, Ar, Ne, CO₂)

A) O₂
B) N₂
C) Ar
D) Ne
E) CO₂

Question 31

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

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

Question 32

The temperature scale used in problems involving gas law equation  must be expressed in _____.

A) celsius
B) kelvin
C) fahrenheit
D) rankine
E) newton

Question 33

A sample of helium occupies 1.40 L at 0 ° C and 760 torr. What pressure will the same gas exert in a 0.500 L vessel at 100 ° C?

A) 371 torr
B) 624 torr
C) 1.56 × 10³ torr
D) 2.91 × 10³ torr
E) 4.05 × 10³ torr

Question 34

According to Charles's law, if the volume of a gas is increased by a factor of 10, then the _____ of the gas is _____ by a factor of _____.

A) volume; increased; 10
B) volume; decreased; 10
C) volume; increased;  1/10^th
D) temperature; increased; 10
E) temperature; decreased; 10

Question 35

If a gas sample is doubled in pressure and in temperature, the volume will be _____.

A) a fourth of the original volume
B) half of the original volume
C) the same as the original volume
D) twice the original volume
E) four times the original volume

Question 36

Which of the following equations combines Charles's law and Boyle's law?

A) PVT = k
B) PT/V = k
C) P/VT = k
D) PV/T = k
E) None of these

Question 37

Which of these is responsible for the rusting of metal and the dulling of paint?

A) N₂
B) O₂
C) Ar
D) He
E) CO₂

Question 38

According to Charles's law, if the volume of a gas is decreased by a factor of 3, then the _____ of the gas is _____ by a factor of _____.

A) volume; increased; 3
B) volume; decreased; 1/3 ^rd
C) volume; increased; 9
D) temperature; increased; 3
E) temperature; decreased; 3

Question 39

_____ is broken down by bacteria in the soil to its compounds, and these compounds are used directly by plants.

A) N₂
B) O₂
C) Ar
D) He
E) CO₂

Question 40

A basketball is inflated to a pressure of 1.50 atm in a garage at a temperature of 20.0 ° C . What will be the pressure of the basketball outside where the temperature is − 5.00 ° C?
​

A) 0.375 atm
B) 1.37 atm
C) 1.42 atm
D) 1.67 atm
E) 3.01 atm

Question 41

Which of the following  statements is true of UV-A and UV-B?

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.
E) UV-A is shorter in wavelength than UV-B.

Question 42

Which of the following is not a risk factor associated with excessive exposure to UV-B rays?

A) Skin cancer
B) Premature aging
C) Cataracts
D) Depressed immune system
E) Tubercolosis

Question 43

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

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

Question 44

Which of these pollutants can damage the kidneys, liver, and nervous system?

A) CO
B) NO₂
C) SO₂
D) O₃
E) Pb

Question 45

Which of these processes is represented by the given equation?
​
C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O + energy

A) Nitrogen fixation
B) Combustion
C) Photosynthesis
D) Respiration
E) Ozone depletion

Question 46

Which of these processes is represented by the given equation?
​
6 H₂O + 6 CO₂ + energy → C₆H₁₂O₆ + 6 O₂

A) Nitrogen fixation
B) Combustion
C) Photosynthesis
D) Respiration
E) Ozone depletion

Question 47

What does PM in the abbreviation PM-2.5 stand for?

A) Primary mist
B) Pollutant material
C) Particulate matter
D) Particles of metal
E) None of these

Question 48

Which of these pollutants gives smog its characteristic brown color?

A) CO
B) NO₂
C) SO₂
D) O₃
E) Pb

Question 49

Which of these gases is absorbed by the earth's oceans and eventually forms carbonates in rocks and soil?

A) N₂
B) O₂
C) Ar
D) He
E) CO₂

Question 50

Which of these acts as a pollutant in the troposphere but as a UV shield in the stratosphere?

A) CO
B) PM-2.5
C) SO₂
D) O₃
E) Pb

Question 51

According to data obtained by NAAQS, which of these pollutants is the most prominent in the United States?

A) CO
B) NO₂
C) SO₂
D) O₃
E) Pb

Question 52

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

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

Question 53

18 ppm equals _____.

A) 0.18%
B) 0.018%
C) 0.0018%
D) 0.00018%
E) 0.000018%

Question 54

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

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

Question 55

Which of these gases is/ are considered inert and unreactive?
I. Ne
II. O₂
III. Ar
IV. CO₂

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

Question 56

Which of these pollutants is produced primarily by agricultural tilling, construction, unpaved roads, and fires?

A) SO₂
B) PM-2.5
C) CO
D) O₃
E) Pb

Question 57

Nitrogen fixation converts nitrogen to _____.

A) cellulose
B) nitrates
C) nitrogen oxides
D) nitric acid
E) glucose

Question 58

Which of these pollutants diminishes the blood's ability to carry oxygen?

A) CO
B) PM-2.5
C) SO₂
D) O₃
E) Pb

Question 59

Meteors burn up in the _____ region of the atmosphere.

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

Question 60

Which region of the atmosphere is credited with the phenomenon known as aurora borealis or the northern lights?

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

Question 61

The _____ layer of the atmosphere contains ozone that protects humans from harmful UV rays.

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

Question 62

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

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 63

The stratosphere over Antarctica in winter is isolated by a swirling mass of air currents called the _____.

A) polar amplification
B) convectional current
C) polar vortex
D) polar current
E) crosswind current

Question 64

All weather phenomena such as clouds and rainfall occur in the _____ layer of the atmosphere.

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

Question 65

Which of these elements is the reason that chemically decomposed ozone will not reform?

A) Carbon
B) Fluorine
C) Oxygen
D) Chlorine
E) Nitrogen

Question 66

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

A) U ltraviolet absorption
B) Combustion
C) Photosynthesis
D) Respiration
E) Ultraviolet emission

Question 67

Chlorofluorocarbons are not used in _____.

A) aerosol propellants
B) refrigeration systems
C) industrial solvents
D) fast-food containers
E) steel utensils

Question 68

_____ is a major precursor to ozone formation and contributes to acid rain.

A) O₃
B) PM-2.5
C) CO
D) NO₂
E) SO₂

Question 69

Which of these regions has the most significant ozone depletion?

A) North America
B) Eastern Europe
C) Antarctica
D) Middle East
E) Southern Africa

Question 70

Which of the following is a primary source of CO?

A) Emissions from motor vehicles
B) Agricultural tilling
C) Emissions from battery plants
D) Emission from refrigerators
E) Construction works

Question 71

Which of these compounds is credited with the accelerated depletion of the ozone layer?

A) CO
B) CFCs
C) O₂
D) NO
E) SO₂

Question 72

Which of these compounds has replaced chlorofluorocarbons (CFCs) that were used in some industries ?

A) HCFCs
B) Freon-12
C) CO₂
D) N₂
E) Silicon