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Organic Chemistry: Some Basic Principles and Techniques — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryOrganic Chemistry: Some Basic Principles and Techniques1 Mark
MCQ
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 vapour in vapour phase. A suitable method for the extraction of these oils from the flowers is :
  • A
    Distillation.
  • B
    Crystallisation.
  • C
    Distillation under reduced pressure.
  • ✓
    Steam distillation.
✓

Answer

Correct option: D.
Steam distillation.
Essential oils are insoluble in water, soluble in steam and have high vapour pressure.
Therefore, they can be separated by steam distillation.

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