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9.3 Common atmospheric pollutants and their sources

9.3 Common atmospheric pollutants and their sources

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Question 1

Carbon monoxide is a toxic gas produced by the incomplete combustion of hydrocarbons.

a.

Propane (C3H8\text{C}_3\text{H}_8C3​H8​) undergoes incomplete combustion in a limited supply of oxygen to form carbon monoxide and water. Balance the equation for this reaction:

2C3H8+7O2→‾CO+8H2O 2\text{C}_3\text{H}_8 + 7\text{O}_2 \rightarrow \underline{\quad\quad} \text{CO} + 8\text{H}_2\text{O} 2C3​H8​+7O2​→​CO+8H2​O
[2]
b.

Incomplete combustion also produces solid particles of carbon (soot). Complete the sentence:

Particles of carbon in the atmosphere reflect sunlight back into space, which causes global _____________.

[1]
Markscheme

9.3 Common atmospheric pollutants and their sources Questions

  1. GCSE
  2. /Chemistry
  3. /9.3 Common atmospheric pollutants and their sources

11 exam-style questions on AQA GCSE Chemistry 9.3 Common atmospheric pollutants and their sources, covering 9.3.1 Atmospheric pollutants from fuels and 9.3.2 Properties and effects of atmospheric pollutants. Each one has a worked solution and a mark scheme showing where the marks go.

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