What do you understand by the term combustion?

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Combustion**: Combustion is a chemical process in which a substance reacts with oxygen and burns. This reaction typically involves the release of energy in the form of heat and light.

2. **Presence of Oxygen**: For combustion to occur, oxygen must be present. This is a crucial requirement for the burning process.

3. **Products of Combustion**: When a hydrocarbon (a compound made of hydrogen and carbon) undergoes combustion, it produces carbon dioxide (CO2) and water (H2O) as the main products, along with the release of heat.

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