Which element is essential for the process of combustion to occur?

• A. Nitrogen
• B. Oxygen
• C. Hydrogen
• D. Carbon

Answer: (B)

Verified step by step guidance

1. Understand the process of combustion: Combustion is a chemical reaction that typically involves a substance (fuel) reacting rapidly with oxygen to produce heat and light.
2. Identify the role of each element listed: Nitrogen is mostly inert in combustion, Hydrogen is often part of fuels but not essential for combustion itself, Carbon is a common element in fuels but not the oxidizing agent.
3. Recall that combustion requires an oxidizing agent to react with the fuel; this agent is usually oxygen from the air.
4. Recognize that oxygen supports the combustion process by accepting electrons during the reaction, enabling the fuel to burn.
5. Conclude that oxygen is the essential element for combustion to occur, as it is the key reactant that sustains the burning process.