List conditions under which combustion can take place.

Combustion, a chemical process yielding heat and often light, necessitates specific conditions to occur:

1. Presence of Fuel: A combustible substance, like gas, wood, or oil, must be available.

2. Availability of Oxygen: Adequate oxygen, usually obtained from the air, is essential for the combustion process.

3. Ignition Source: An initial heat source, like a spark or flame, is necessary to start the combustion reaction.

4. Combustion Temperature: The fuel must attain its ignition temperature, also called the kindling point, to sustain combustion independently.

5. Continuous Heat Supply: Sustained combustion requires an ongoing heat supply, either from the initial ignition or the reaction itself, to maintain necessary temperatures.

6. Proper Fuel-Oxygen Mixing: Efficient combustion demands proper mixing of fuel and oxygen to facilitate the chemical reaction.

These conditions, when adequately met, facilitate combustion, allowing the fuel to react with oxygen, producing heat, light, and combustion products like water vapor and carbon dioxide.