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