1.
Which of these process is not used in extracting essential oil?
Correct Answer
A. Expression
Explanation
Expression is the process of extracting essential oil by physically squeezing or pressing the plant material, such as citrus peels, to release the oil. Solvent extraction involves using a solvent, such as hexane, to dissolve the oil from the plant material. Wax embedding is a technique used to preserve plant material, but it does not involve extracting essential oil. Fumarate is a salt or ester of fumaric acid and is not a process used in extracting essential oil.
2.
What does essential oils perform in food and drinks?
Correct Answer
A. Flavour
Explanation
Essential oils perform the function of adding flavor to food and drinks. They are highly concentrated plant extracts that contain the natural aroma and taste of the plant they are derived from. By adding a few drops of essential oils to recipes, they can enhance the overall taste and provide a distinct flavor profile. Therefore, essential oils are used to infuse food and drinks with different flavors, making them more enjoyable and aromatic.
3.
Which of these functions does essential oils perform in household cleansing products?
Correct Answer
B. Scent
Explanation
Essential oils perform the function of providing scent in household cleansing products. They are often added to cleaning products to give them a pleasant fragrance, making the cleaning experience more enjoyable. Essential oils are derived from plants and have strong and distinct aromas, which can help mask any unpleasant odors associated with cleaning. Additionally, certain essential oils have antibacterial or antifungal properties, which can also contribute to the overall effectiveness of the cleaning product.
4.
What century is the essential oil believed to originate?
Correct Answer
A. 12th
Explanation
The essential oil is believed to originate in the 12th century.
5.
Which of these is a common essential oil?
Correct Answer
D. All of the above
Explanation
All of the options listed (tea oil, lavender, and peppermint) are commonly used as essential oils. Essential oils are concentrated plant extracts that are used for various purposes such as aromatherapy, skincare, and natural remedies. Tea oil, also known as tea tree oil, is derived from the leaves of the tea tree plant and is known for its antiseptic properties. Lavender oil is extracted from the flowers of the lavender plant and is often used for its calming and soothing effects. Peppermint oil is derived from the peppermint plant and is commonly used for its refreshing and invigorating scent.
6.
What distillation apparatus is used in making essential oils?
Correct Answer
A. Alembic
Explanation
An alembic is a type of distillation apparatus that is commonly used in making essential oils. It consists of a pot or flask with a long neck and a condenser attached to it. The essential oil is heated in the pot, and the vapor rises up through the neck and condenses back into a liquid in the condenser. This allows for the separation of the essential oil from the plant material and other impurities, resulting in a pure and concentrated form of the oil.
7.
What is the recondensed water referred to as?
Correct Answer
A. Hydrosol
Explanation
Hydrosol is the correct answer because it refers to the recondensed water. Hydrosol is a byproduct of the distillation process, where plant material is steam distilled to extract essential oils. The steam carries the aromatic compounds of the plant, which then condenses and separates into two parts: the essential oil and the recondensed water, known as hydrosol. Hydrosol contains trace amounts of the plant's essential oil and has a mild aroma and therapeutic properties.
8.
What is the essential oil used as among these?
Correct Answer
D. All of the above
Explanation
All of the above is the correct answer because essential oils can be used as antiseptics, scenting agents, and flavorings. They have natural antimicrobial properties that make them effective as antiseptics. Essential oils are also commonly used in perfumes, candles, and other products as scenting agents because of their pleasant aromas. Additionally, certain essential oils are used in cooking and baking to add flavor to dishes. Therefore, all of the given options are correct as essential oils can be used for all these purposes.
9.
What alternative medicine is the oil used for?
Correct Answer
A. Aromatherapy
Explanation
The correct answer is Aromatherapy because essential oils are commonly used in aromatherapy practices. Aromatherapy involves the use of natural plant extracts, such as essential oils, to promote physical and psychological well-being. These oils are often inhaled or applied topically to stimulate certain responses in the body, such as relaxation, stress relief, or improved mood. Therefore, the oil mentioned in the question is most likely used in the context of aromatherapy.
10.
Which of these plant sources is the essential oil obtained from?
Correct Answer
A. Medicago sativa
Explanation
Medicago sativa, also known as alfalfa, is the plant source from which the essential oil is obtained.