Property responsible for spreading of fragrance of flower is ________ .

Options

A. compressibility of gas/vapour
B. diffusion of gas/vapour
C. expansibility of gas/vapour
D. Both 3 and 2

Explanation

To solve the question "Property responsible for spreading of fragrance of flower is ________," we need to identify the correct property that describes how the fragrance spreads in the air.

### Step-by-Step Solution:

1. **Understanding the Question**:
- The question asks for the property that allows the fragrance of a flower to spread. This involves how the molecules of the fragrance move through the air.

2. **Identifying Relevant Concepts**:
- The fragrance of a flower consists of molecules that can disperse in the air. We need to think about how these molecules travel from one place to another.

3. **Considering Properties of Gases**:
- The relevant properties of gases that can explain the spreading of fragrance include:
- **Diffusion**: The process by which molecules spread from areas of high concentration to areas of low concentration.
- **Compressibility**: The ability of a substance to decrease in volume under pressure.
- **Expansibility**: The ability of a substance to expand when heated or when pressure is released.

4. **Analyzing Each Property**:
- **Diffusion**: This is the correct property because it describes how the fragrance molecules spread throughout the air. The molecules move and mix with the air, allowing the scent to be detected from a distance.
- **Compressibility**: This property does not apply to the spreading of fragrance, as it refers to changing the state of gas to liquid under pressure.
- **Expansibility**: While gases can expand, this does not specifically describe the process of fragrance spreading.
- **Both Compressibility and Expansibility**: Since neither of these properties relates to the spreading of fragrance, this option is incorrect.

5. **Conclusion**:
- The correct answer to the question is **Diffusion**. This property explains how the fragrance of a flower spreads through the air.

### Final Answer:
The property responsible for the spreading of fragrance of a flower is **Diffusion**.

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