CAIE A-Level Chemistry AS 12.1.3 Nox Sources and Catalytic Removal Questions
Practise identifying natural and human NOx sources and explaining their reduction in vehicle catalytic converters.
- Syllabus
- 2028–2030
- Course
- Chemistry 9701
- Level
- AS
Exam points
- Identify natural lightning and man-made combustion or power-station sources of nitrogen oxides.
- Explain that high-temperature reaction of atmospheric N₂ and O₂ forms NOx, and write or interpret the relevant formation equation.
- Explain catalytic-converter removal of NOx by reduction with CO or other exhaust reductants, including a balanced equation and catalyst role.
CAIE A-Level Chemistry AS 12.1.3 Nox Sources and Catalytic Removal Questions question 1
[Maximum number: 1]
Which statement about the oxides of nitrogen is correct?
A
During lightning storms, atmospheric oxygen and nitrogen combine to form oxides of nitrogen.
B
In a catalytic converter, nitrogen monoxide is removed by reaction with carbon dioxide.
C
In car engines, the restricted supply of oxygen eliminates the possibility of the formation of oxides of nitrogen.
D
In the atmosphere, nitrogen monoxide reacts with sulfur dioxide to produce sulfur trioxide.
A
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