Which of these is an example of rapid combustion?

Options

A. Burning of phosphorous in air
B. Burning of methane in air
C. Burning of a match stick
D. Burning of paper

Answer

To determine which of the given options is an example of rapid combustion, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Combustion Types**:
- Combustion can be classified into different types, such as rapid combustion, spontaneous combustion, complete combustion, and incomplete combustion.
- Rapid combustion is characterized by a quick reaction that produces heat and light.

2. **Analyzing the First Option: Burning of Phosphorus in Air**:
- When phosphorus burns in air, it does so spontaneously.
- This type of combustion occurs without any external ignition source.
- Therefore, this is not an example of rapid combustion.

3. **Analyzing the Second Option: Burning of Methane in Air**:
- Methane (CH₄) burns in the presence of sufficient oxygen to produce carbon dioxide (CO₂) and water (H₂O).
- This process is known as complete combustion, which is not classified as rapid combustion.
- Thus, this option is also incorrect.

4. **Analyzing the Third Option: Burning of Matchstick**:
- When a matchstick is struck, it ignites quickly and produces heat and light.
- This is a clear example of rapid combustion, as it occurs rapidly and produces significant heat and light.
- Therefore, this option is correct.

5. **Analyzing the Fourth Option: Burning of Paper**:
- When paper burns, it does so in the presence of limited oxygen, leading to incomplete combustion.
- This process produces ash, carbon monoxide, and smoke, which does not fit the definition of rapid combustion.
- Hence, this option is also incorrect.

### Conclusion:
The correct answer is the **third option: Burning of Matchstick**, as it exemplifies rapid combustion.