Carbon monoxide is a poisonous gas, 1% of which in the air can kill a person in:
Correct answer: C. In five minutes
- A. No time
- B. In ten minutes
- C. In five minutes
- D. In fifteen minutes
Explanation
At about 1% concentration, carbon monoxide combines with haemoglobin so rapidly that oxygen transport is critically blocked and death may occur within minutes. Five minutes is the commonly cited textbook value among these options.
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