9.4 Pollutants from burning fuels
5 exam questions worth 10 marks. Write your answer, open the mark scheme, then give yourself the marks you earned. Your answers are saved on this device.
0 / 10
Which pollutant is mainly responsible for acid rain?
Choose one answer.
Correct Not quite: the answer is Sulfur dioxide
Mark scheme
D
Model answer
D: sulfur dioxide dissolves in rainwater to form acid rain.
Explain why carbon monoxide is dangerous.
Mark scheme
- it is toxic / combines with haemoglobin (1)
- so the blood carries less oxygen (1)
Model answer
Carbon monoxide combines with haemoglobin in red blood cells, reducing the amount of oxygen the blood can carry, and it cannot be seen or smelt.
Explain how oxides of nitrogen are produced in car engines.
Mark scheme
- nitrogen and oxygen from the air react (1)
- at the high temperatures in the engine (1)
Model answer
At the very high temperatures in the engine, nitrogen and oxygen from the air react together.
Give two effects of particulates (soot) in the atmosphere.
Mark scheme
any two from:
- lung damage / breathing problems (1)
- global dimming (1)
- blackening of buildings (1)
Model answer
They damage the lungs and cause global dimming.
Describe what causes incomplete combustion and name its products.
Mark scheme
- a limited supply of oxygen (1)
- carbon monoxide (1)
- carbon / soot and water (1)
Model answer
Incomplete combustion happens when there is not enough oxygen, producing carbon monoxide, soot and water.
Found a mistake?