The fragrnance of flower is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscrible with water vapour in vapour phase. A suitable method for the extraction of these oils from the flower is

Options

A. distillation
B. crystallisation
C. distillation under reduced pressure
D. steam distillation

Explanation

To extract essential oils from flowers, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Essential Oils**: Essential oils are steam volatile organic compounds responsible for the fragrance of flowers. They are generally insoluble in water at room temperature but are miscible with water vapor in the vapor phase.

2. **Properties of Essential Oils**:
- **Insoluble in Water**: Essential oils do not dissolve in water when in liquid form.
- **Miscible in Vapor Phase**: They can mix with water vapor when both are in the vapor phase.
- **High Vapor Pressure**: Essential oils have a high vapor pressure, especially at elevated temperatures (like 373 K).

3. **Choosing the Extraction Method**: Given the properties of essential oils, particularly their steam volatility, the most suitable method for extraction is steam distillation. This method utilizes steam to carry the volatile compounds away from the plant material.

4. **Conclusion**: The essential oils can be effectively extracted from flowers using the steam distillation process. This method takes advantage of the oils' high vapor pressure and their ability to mix with water vapor.

### Final Answer:
The suitable method for the extraction of essential oils from flowers is **steam distillation**.

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