Multiple choice

Which of the following is necessary for burning (combustion)?

  1. Petrol

  2. Oxygen

  3. Nitrogen

  4. Kerosene oil
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Combustion (burning) requires three things: fuel, heat, and oxygen. This is called the fire triangle. Petrol and kerosene are fuels, not the requirement for burning itself. Nitrogen does not support combustion (it's used in fire extinguishers). Oxygen is the essential reactant that enables burning.

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