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?

• 80.8cm³

• 64.6cm³

• 48.6cm³

• 16.8 cm³

Which is not a problem caused by acid rain?

• breathing difficulties

• erosion of marble statues

• dying trees

• lowered pH of lakes

Which pollutant can cause brain damage?

• Lead compounds

• Particulate matter

• Sulfur dioxide

• Nitrogen oxides

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

Which of these processes may produce sulfur dioxide?

1 combustion of fossil fuels

2 lightning activity

3 volcanic eruptions

• 1 and 2 only

• 1 and 3 only

• 2 and 3 only

• 1, 2 and 3

Which statements about pollutants are correct?

1 Carbon monoxide is responsible for the production of ‘acid rain’.

2 Oxides of nitrogen are present in car exhausts.

3 Sulfur dioxide can be produced by the combustion of fossil fuels.

• 1, 2 and 3

• 1 and 2 only

• 1 and 3 only

• 2 and 3 only