Fuels And Pollution

Question 1

How is carbon dioxide formed

Answer 1

Complete combustion

Potential problems: greenhouse gas which contributes to global warming

Ways to reduce the problem: burn less fossil fuels

Question 2

How is carbon monoxide formed

Answer 2

Incomplete combustion

Potential problems: toxic, carboxy-haemoglobin

Ways to reduce problem: complete combustion, plentiful supplies of oxygen, cleaner engines

Question 3

How is carbon formed

Answer 3

Incomplete combustion

Potential problems: global dimming, blackens buildings

Ways to reduce the problem: see carbon monoxide

Question 4

How is sulphur dioxide formed

Answer 4

Sulphur impurities in fuel

Potential problems: causes acid rain, corrodes limestone, bad for agriculture

Ways to reduce the problem: burn it less, remove sulphur impurities

Question 5

How are nitrogen oxides formed

Answer 5

Nitrogen and oxygen at a very high temperature

Potential problems: kills brain cells, asthma, acid rain

Ways to reduce the problem: catalytic converters and engines

Question 6

How are unburned fuels formed

Answer 6

Incomplete combustion

Potential problems: greenhouse gases, harmful

Ways to reduce the problem: ensure the correct fuel to air mixture when fuel is burned

Question 7

When does incomplete combustion occur

Answer 7

Incomplete combustion occurs when there is a limited supply of oxygen.