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Questions and Answers
Which process is applicable to volatile oils but not to fixed oils?
Which process is applicable to volatile oils but not to fixed oils?
- Saponification
- Steam distillation (correct)
- Volatilization at room temperature
- Solubility in organic solvents and alcohol
What is the significance of fixed oils compared to volatile oils?
What is the significance of fixed oils compared to volatile oils?
- Nutritive value (correct)
- Therapeutic agents
- Flavoring agents
- Starting materials for semi-synthesis
What is the main difference between volatile oils and fixed oils?
What is the main difference between volatile oils and fixed oils?
- Steam distillation
- Action of air and light in storage
- Nutritive value
- Volatility at room temperature (correct)
What is the composition difference between volatile and fixed oils?
What is the composition difference between volatile and fixed oils?
Which type of oil leaves a permanent stain on filter paper?
Which type of oil leaves a permanent stain on filter paper?
Match the type of oils with their solubility properties:
Match the type of oils with their solubility properties:
Match the type of oils with their volatilization properties:
Match the type of oils with their volatilization properties:
Match the type of oils with their filter paper stain properties:
Match the type of oils with their filter paper stain properties:
Match the type of oils with their action in storage:
Match the type of oils with their action in storage:
Match the importance of volatile oils with their primary usage:
Match the importance of volatile oils with their primary usage:
Match the type of oils with their volatilization at room temperature properties:
Match the type of oils with their volatilization at room temperature properties:
Match the type of oils with their solubility properties:
Match the type of oils with their solubility properties:
Match the type of oils with their nutritive value properties:
Match the type of oils with their nutritive value properties:
Match the importance of volatile oils with their primary usage:
Match the importance of volatile oils with their primary usage:
Match the action of air and light in storage with the type of oils:
Match the action of air and light in storage with the type of oils:
Flashcards
Steam Distillation
Steam Distillation
A distillation technique used for extracting volatile oils, not suitable for fixed oils.
Nutritive Value in Oils
Nutritive Value in Oils
Fixed oils have nutritive value because they contain essential fatty acids and calories, unlike volatile oils.
Volatility of Oils
Volatility of Oils
Volatile oils evaporate at room temperature, while fixed oils do not.
Composition of Volatile Oils
Composition of Volatile Oils
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Filter Paper Stain
Filter Paper Stain
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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.
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