A mobile electricity generator burns fuel. A filter is fitted to the exhaust. The concentrations of four pollutants are measured before and after the filter is fitted.
The results are shown in the table.
| Pollutant | Before the filter was fitted (mg/m³) | After the filter was fitted (mg/m³) |
|---|---|---|
| Carbon monoxide | 220 | 220 |
| Particulates | 96 | 12 |
| Sulfur dioxide | 38 | 38 |
| Oxides of nitrogen | 180 | 180 |
An engineer claims, "The filter makes the exhaust safe for people and prevents environmental damage."
Evaluate the engineer's claim. Use the results in the table and your knowledge of atmospheric pollutants.
102 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.