Question detail
Why is carbon monoxide considered toxic?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Common atmospheric pollutants and their sources
Question
- A. It reduces the ability of blood to carry oxygen
- B. It increases the amount of carbon dioxide in the blood
- C. It causes respiratory problems
- D. It is a greenhouse gas
Answer
The correct option is It reduces the ability of blood to carry oxygen. This answer is correct because it matches the approved learning objective to explain why carbon monoxide is toxic because it reduces the ability of blood to carry oxygen in the subtopic Properties and effects of atmospheric pollutants.
Explanation
The correct option is It reduces the ability of blood to carry oxygen. It reduces the ability of blood to carry oxygen is correct because it directly supports the approved learning objective to explain why carbon monoxide is toxic because it reduces the ability of blood to carry oxygen. This belongs to the subtopic Properties and effects of atmospheric pollutants within Common atmospheric pollutants and their sources, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Properties and effects of atmospheric pollutants.
Common mistake
Misunderstanding Carbon Monoxide Toxicity
Students often think carbon monoxide is toxic because it is a poison, without understanding its specific effect on blood.
Clarify that carbon monoxide binds to hemoglobin in red blood cells, reducing their ability to carry oxygen, which is the reason for its toxicity.
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