Questions and Answers
Which process is applicable to volatile oils but not to fixed oils?
Steam distillation
What is the significance of fixed oils compared to volatile oils?
Nutritive value
What is the main difference between volatile oils and fixed oils?
Volatility at room temperature
What is the composition difference between volatile and fixed oils?
Signup and view all the answers
Which type of oil leaves a permanent stain on filter paper?
Signup and view all the answers
Match the type of oils with their solubility properties:
Signup and view all the answers
Match the type of oils with their volatilization properties:
Signup and view all the answers
Match the type of oils with their filter paper stain properties:
Signup and view all the answers
Match the type of oils with their action in storage:
Signup and view all the answers
Match the importance of volatile oils with their primary usage:
Signup and view all the answers
Match the type of oils with their volatilization at room temperature properties:
Signup and view all the answers
Match the type of oils with their solubility properties:
Signup and view all the answers
Match the type of oils with their nutritive value properties:
Signup and view all the answers
Match the importance of volatile oils with their primary usage:
Signup and view all the answers
Match the action of air and light in storage with the type of oils:
Signup and view all the answers
Study Notes
Volatile and Fixed Oils
- Volatile oils are applicable to a process that is not applicable to fixed oils: steam distillation.
Characteristics of Volatile and Fixed Oils
- Fixed oils are typically non-volatile, with a higher molecular weight and a greater viscosity than volatile oils.
- Volatile oils are composed of hydrocarbons, aldehydes, ketones, and esters, whereas fixed oils are composed of triglycerides.
- Fixed oils leave a permanent stain on filter paper, whereas volatile oils do not.
Solubility Properties
- Volatile oils are soluble in ethanol, whereas fixed oils are soluble in hexane or ether.
Volatilization Properties
- Volatile oils are highly volatile and evaporate quickly, even at room temperature, whereas fixed oils are not volatile.
Filter Paper Stain Properties
- Fixed oils leave a permanent stain on filter paper, whereas volatile oils do not.
Action in Storage
- Fixed oils can become rancid when exposed to air and light, whereas volatile oils are relatively stable.
Importance and Primary Usage of Volatile Oils
- Volatile oils are primarily used for their aroma, flavor, and medicinal properties.
Additional Properties
- Fixed oils have a higher nutritive value than volatile oils.
- Air and light can cause fixed oils to become rancid, whereas volatile oils are relatively stable.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge about volatile oils with this quiz by Dr. Heba Fahmy. Learn about the definition, properties, and sources of volatile oils.
