Question detail
Explain how carbon monoxide is produced and why it is considered a toxic gas.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Common atmospheric pollutants and their sources
Question
Explain how carbon monoxide is produced and why it is considered a toxic gas.
Answer
Carbon monoxide is produced during the incomplete combustion of fuels, such as when there is insufficient oxygen. It is considered toxic because it binds with hemoglobin in the blood more effectively than oxygen, reducing the blood's ability to carry oxygen to vital organs.
Explanation
A strong answer should directly address the approved learning objective to distinguish carbon dioxide as a greenhouse gas from pollutants such as carbon monoxide, sulfur dioxide, oxides of nitrogen and particulates. This question belongs to Atmospheric pollutants from fuels within Common atmospheric pollutants and their sources, so the response should use that exact curriculum context rather than a generic statement. The answer is correct when it names the key idea, explains the link to pollutant, and keeps the wording specific to AQA GCSE revision.
Common mistake
Confusing Carbon Dioxide with Pollutants
Students often confuse carbon dioxide, which is a greenhouse gas, with pollutants like carbon monoxide and sulfur dioxide.
Remember that carbon dioxide is classified as a greenhouse gas, while carbon monoxide, sulfur dioxide, and oxides of nitrogen are considered pollutants that can harm the environment and human health.
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