The fragrance of flowers 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 miscible with water vapor in the vapor phase. A suitable method for the extraction of these oils from the flowers is
1. Distillation
2. Crystallisation
3. Distillation under pressure
4. Steam distillation
Hint: Essential oil is steam volatile
As we know, essential oils are insoluble in water and have high vapour-pressure at 373 K but are miscible with water-vapour in vapour phase, it means these are steam volatile. Hence, steam distillation technique is used for the extraction of essential oils.
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