Method of Obtaining Volatile Oils from Plants
Volatile oils from plants are obtained by:
- Solvent extraction
- Distillation — Correct Answer
- Expression
- Fermentation
Explanation:
Correct Answer: Distillation
Volatile oils (also called essential oils) are obtained by distillation. Examples: turpentine oil, eucalyptus oil.
Contrast: Fixed Oils
Fixed oils are obtained by expression. Examples: castor oil, coconut oil.
Other Plant-Derived Drug Categories
- Tannins: Non-nitrogenous phenol derivatives; astringent; form inky solutions with ferric salts; e.g. catechu (used for diarrhoea).
- Saponins: Non-nitrogenous; soluble in water; give persistent foam on shaking; e.g. fenugreek, ginseng.
- Resins: Solid brittle substances; insoluble in water; e.g. asafoetida, camphor.
- Gums: Dried exudates; form jelly with water; e.g. gum acacia.
📚 About this Topic — Veterinary Pharmacology and Toxicology
This multiple choice question is from Veterinary Pharmacology and Toxicology, Veterinary Science. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Veterinary Pharmacology and Toxicology to strengthen your preparation.
