IGCSE Air and Air Pollutants

What is the % of nitrogen in air?

• 75%

• 71%

• 78%

• 60%

Which is NOT a use of oxygen?

• In oxyacetylene torch used in welding

• As breathing aid in hospitals

• Remove impurities in steel-making

• Produce ammonia for making fertiliser

In an 80cm³ jar filled with air, how much is oxygen?

• 80cm³

• 64cm³

• 20cm³

• 16cm³

Which is not a problem caused by acid rain?

• breathing difficulties

• erosion of marble statues

• dying trees

• lowered pH of lakes

Motorised vehicles are the major source of which pollutants? Tick all that apply.

• sulfur dioxide

• oxides of nitrogen

• carbon monoxide

• particulates (unburnt carbon)

Name 2 compounds in unpolluted air.

• carbon monoxide and argon

• sulfur dioxide and nitrogen dioxide

• carbon dioxide and water vapour

• nitrogen and oxygen

Which air pollutants can cause acid rain?

• Nitrogen oxides and sulfur dioxide

• Sulfur dioxide and carbon monoxide

• Nitrogen oxides and ozone

• Sulfur dioxide and ozone

Which reduces the amount of oxygen that red blood cells can carry?

• Nitrogen oxides

• Carbon monoxide

• Sulfur dioxide

• Lead compounds

Which can cause hyperactivity and lowered IQ in children?

• Oxides of nitrogen

• Particulate matter

• Sulfur dioxide

• Lead compounds

120 cm³ sample of air is passed over heated copper until there is no further decrease in volume.

What volume of gas remains in the syringe?

• 24 cm³

• 42 cm³

• 78 cm³

• 96 cm³