Multiple choice

Which of the following statements is true regarding CO2 acting as fire extinguisher?

  1. CO2 reacts with oxygen

  2. CO2 is lighter than oxygen

  3. CO2 is heavier than oxygen

  4. CO2 raises the temperature of the fuel
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carbon dioxide (CO2) is heavier than oxygen and air, which allows it to settle and form a blanket over burning material, displacing the oxygen needed for combustion. CO2 does NOT react with oxygen (option A is wrong), and it does NOT raise temperature (option D is wrong). Its effectiveness comes from being denser than oxygen and physically displacing it.

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