A sample of gas from a chimney contains carbon monoxide, sulfur dioxide and oxides of nitrogen. What can be concluded about the fuel and about the combustion?
The fuel contained no carbon and it burned completely
The fuel contained no sulfur and it burned completely
The fuel contained sulfur and it burned completely
The fuel contained sulfur and it burned incompletely
40 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.