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Environmental Chemistry: Pollution and Conservation - SS3 Chemistry Past Questions and Answers - page 1

1

Which of the following is a primary source of air pollution?

 

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A

Volcanic eruptions

 

B

Fossil fuel combustion

 

C

Deforestation

 

D

Industrial emissions

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2

The release of untreated sewage into water bodies is an example of:

 

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A

Air pollution

 

B

Land pollution

 

C

Water pollution

 

D

Noise pollution

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3

Acid rain is primarily caused by the emission of which pollutants into the atmosphere?

 

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A

Carbon dioxide (CO2)

 

B

Nitrogen oxides (NOx) and sulphur dioxide (SO2)

 

C

Methane (CH4) and hydrochlorofluorocarbons (HCFCs)

 

D

Particulate matter (PM)

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4

Which of the following is a source of thermal pollution in water bodies?

 

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A

Oil spills

 

B

Agricultural runoff

 

C

Industrial effluents

 

D

Discharge of heated water from power plants

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5

The depletion of ozone in the stratosphere is primarily caused by the release of:

 

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A

Carbon monoxide (CO)

 

B

Volatile organic compounds (VOCs)

 

C

Chlorofluorocarbons (CFCs)

 

D

Lead (Pb) particles

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6

Eutrophication in water bodies is often caused by an excess of which nutrient?

 

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A

Nitrogen

 

B

Oxygen

 

C

Carbon

 

D

Phosphorus

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7

Which of the following is a secondary source of air pollution?

 

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A

Forest fires

 

B

Volcanic eruptions

 

C

Residential heating

 

D

Pesticide application

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8

Ground-level ozone, a major component of smog, is formed through reactions involving:

 

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A

Sulphur dioxide (SO2) and sunlight

 

B

Carbon dioxide (CO2) and nitrogen oxides (NOx)

 

C

Methane (CH4) and water vapour

 

D

Nitrogen oxides (NOx) and volatile organic compounds (VOCs)

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9

Noise pollution is measured in units of:

 

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A

Decibels (dB)

 

B

Particulate matter (PM)

 

C

Parts per million (ppm)

 

D

Micrometers (µm)

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10

Which of the following is a source of light pollution?

 

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A

Agricultural runoff

 

B

Airplanes

 

C

Streetlights and outdoor advertising

 

D

Erosion of soil

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