Multiple choice

Which of the following gases is the most dangerous when inhaled?

  1. Carbon dioxide

  2. Nitrogen

  3. Carbon monoxide

  4. Oxygen

  5. Methane
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbon monoxide is the most dangerous when inhaled as it can lead to significant toxicity to the central nervous system and heart and can even cause death.

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