WBCS.LIVE practice question

Which gas is essential for the process of combustion (burning)?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Nitrogen
  2. Hydrogen
  3. Carbon dioxide
  4. Oxygen

Correct answer and explanation

Correct answer: Oxygen

Explanation: āœ… Correct Answer: D) Oxygen šŸ“š Explanation: Oxygen is a highly reactive non-metal that acts as a powerful oxidizing agent in combustion reactions. While oxygen itself is not flammable, it must be present for a fuel to burn and release energy. In the Earth's atmosphere, the approximately 21% concentration of oxygen supports both fire and aerobic respiration in living organisms.