CHM252

1. What size range do particulate matter typically fall into according to their diameter?

• 0.1 to 25 micrometers

• 0.01 to 1 micrometers

• 1 to 10 micrometers

• 0.5 to 15 micrometers

Which hydrocarbon compounds are typically found in the atmosphere within the range of C1 to C10?

• Aliphatic hydrocarbons

• Polynuclear aromatic hydrocarbons

• Saturated hydrocarbons

• Volatile hydrocarbons

Which group of hydrocarbons has raised significant environmental concerns due to their structure?

• Aliphatic hydrocarbons

• Polynuclear aromatic hydrocarbons (PAH)

• Aromatic hydrocarbons

• Saturated hydrocarbons

What percentage of carbon monoxide emissions can be attributed to motor vehicles on a global basis?

• 30%

• 45%

• 55%

• 75%

What does the term 'fine particulate matter' specifically refer to in terms of diameter?

• Particles between 2.5 and 10 micrometers

• Particles larger than 5 micrometers

• Particles less than 2.5 micrometers

• Particles less than 1 micrometer

What is the principal source of oxides of carbon related to air pollution?

• Ozone depletion

• Fossil fuel combustion

• Vegetation emissions

• Inhalation by humans