Multiple choice

Which gas in the atmosphere helps in burning?

  1. Nitrogen

  2. Carbon dioxide

  3. Oxygen

  4. Argon
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Oxygen is the gas in air that supports combustion (burning). Burning is essentially rapid oxidation - fuel combines with oxygen releasing heat and light. Without oxygen, combustion cannot occur. Nitrogen actually suppresses combustion.

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