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Chapter 15 chen > Air > Flashcards

Air Flashcards

1
Q

What does clean air compose of

A

71% nitrogen 21% oxygen 1% gases

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2
Q

What does clean air compose of

A

71% nitrogen 21% oxygen 1% gases

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3
Q

What is air

A

Mixture and component separated by fractional distillation

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4
Q

Property of atmospheric air

A

Liquid in very low temp

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5
Q

What property of atmospheric air

A

Liquid at very low temperatures

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6
Q

Common air pollutants

A

Sulfur dioxide
Oxides of nitrogen
Carbon monoxide
Methane unburnt
Hydrocarbon
Ozone

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7
Q

Sources to control air pollution

A

Carbon monoxide
Oxides of nitrogen
Unbunrt hydrocarbon
(Catalytic converter)

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8
Q

Use of catalytic converter

A

Fitted to motor vehicles to oxides co into less harmful co2 and reduce No to harmless gas
- redox reaction

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9
Q

Use of catalytic converter

A

Fitted to motor vehicles to oxides Co into less harmful co2 and reduce No to harmless gas
- redox reaction

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10
Q

Why catalyic converter cannot work

A

Co2 greenhouse gas that causes global warming

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11
Q

Air control on sulfur dioxide

A

Flure gas desulfurisation

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12
Q

What is flure gas desulfurisation

A

Exhaust gas from coal burning station are sprayed with suspension of calcium oxide or calcium carbonate

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13
Q

Ozone depletion

A

Cause by chlorofluorocarbons, compounds that contain chlorine carbon and fluorine

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14
Q

What is ozone depletion

A

Caused by chlorofluorocarbons

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15
Q

Use of ozone

A

Prevent harmful ultraviolet radiation from sun reach earth, by absorbing it

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16
Q

Use of ozone

A

Prevent harmful ultraviolet radiation from sun reach earth, by absorbing it

17
Q

Issue of ozone depletion

A

Skin cancer genetic mutation

18
Q

Issue of ozone depletion

A

Skin cancer genetic mutation

19
Q

How is ozone layer destroyed

A

Chlorine atoms react with ozone molecules in the stratosphere to form chlorine oxide and oxygen. Chlorine oxide continues to break up another ozone molecules, release chlorine atoms

Cl atoms remain chemically unchanged after the reaction and is repeated

20
Q

Carbon cycle

A

Combustion
Respiration
Photosynthesis

Chapter 15 chen (20 decks)

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