Multiple choice

Which component of air does not support combustion?

  1. Oxygen

  2. Nitrogen

  3. Dust particles

  4. Nirogen and oxygen both
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nitrogen makes up about 78% of air and does not support combustion. In fact, nitrogen is used in fire suppression systems because it displaces oxygen and stops burning. Oxygen supports combustion, while nitrogen acts as a diluent that prevents fires from spreading.

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