C1 PART 2

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Created by: Roshniraii
Created on: 13-04-14 16:35

C1P2/17.What benefits do people gain from cooking food using oil?

Improved tase,texture. Increases energy content.Shorter cooking time

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C1P2/18.Why do Doctors warn people to avoid eating too much oil?

Can lead ---> Obesity,Diabetes,Heart disease and high blood pressure

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C1P2/19.Where do plant oils come from?

Fruits, Seeds, Nuts

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C1P2/20.Name two ways you can extract plant oil

Pressing,Solvent extraction and distilation

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C1P2/21.List the instruction of Solvent extraction and distillation[part 1]

Remove hulls from seeds,press seeds to obtain some oil,Add a a solvent such as hexane to the solid that remains.Use distillation to separate the solvent from the oil that is dissolved in it

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C1P2/22.How can you use steam distilation to extract lavender oil?

-Heat water so that it boils and begins to make steam -Allow the steam to pass through the plant material.The volatile oils in the lavender vaporise-The steam and plant oil vapour move to the condenser.-The beaker contains lavender oil & water

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C1P2/23.List the instructions of how to harden unsaturated oils [hydrogenation]

-Vegetable oils that are unsaturated can be hardened by reacting them with hydrogen in the presence of nickel catalyst at about 60C. Hydrogen adds to the carbon-carbon double bonds.The hydrogenated oils have higher melting points so they are solids

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C1P2/24.What are emulsifiers?

Material that enables a stable mixture to be formed between two liquids that would normally separate,such as oil & water

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C1P2/25.What are emulsions?

Mixture containing small drops of one liquid spread through out a second liquid

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C1P2/26.How can emulsions be used?

-Salad dressing,Ice cream,Hand Creams

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C1P2/27.What are the two ends of an Emulsifier molecule have?

-Hydrophilic and Hydrophobic

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Other cards in this set

Card 2

Front

C1P2/18.Why do Doctors warn people to avoid eating too much oil?

Back

Can lead ---> Obesity,Diabetes,Heart disease and high blood pressure

Card 3

Front

C1P2/19.Where do plant oils come from?

Back

Card 4

Front

C1P2/20.Name two ways you can extract plant oil

Back

Card 5

Front

C1P2/21.List the instruction of Solvent extraction and distillation[part 1]

Back

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C1 PART 2