C1: Plant Oils

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Mayonnaise contains mainly oil, egg yolk and water. Which of these components acts as the emulsifier?
Egg yolk
1 of 10
What are plant and vegetable oils good sources of?
Energy
2 of 10
What catalyst is used to add hydrogen across carbon-carbon double bonds during the hardening of vegetable oils?
Nickel
3 of 10
Why does oil float on the surface of water?
Oil and water do not mix and oil is less dense.
4 of 10
Vegetable oils are important foods. Which of these statements are true? i. Vegetable oils can be extracted from plants by pressing or by distillation. ii. Vegetable oils have a high energy content. iii. Vegetable oils can be used to make biofuels.
All of these
5 of 10
Why do vegetable oils cook food faster than water?
Vegetable oils have a higher boiling point so the oil is hotter and the food cooks quicker.
6 of 10
How can you show that a vegetable oil is unsaturated?
By using the oil to decolourise bromine water.
7 of 10
Which of these statements are true? i. The tail end is the hydrocarbon tail and this is hydrophilic. ii. The tail end is the hydrocarbon tail and this is hydrophobic.
The tail end is the hydrocarbon tail and this is hydrophobic.
8 of 10
Emulsions have special properties. Which of these statements are true? i. Emulsions are thinner than oil but thicker than water. ii. Emulsions are smooth and have a good texture. iii. Paints, salad dressings and ice cream are emulsions.
i. and ii. Emulsions are actually thicker.
9 of 10
Vegetable oils are usually liquids. How can they be changed into solids?
The vegetable oil is reacted with hydrogen gas.
10 of 10

Other cards in this set

Card 2

Front

What are plant and vegetable oils good sources of?

Back

Energy

Card 3

Front

What catalyst is used to add hydrogen across carbon-carbon double bonds during the hardening of vegetable oils?

Back

Preview of the front of card 3

Card 4

Front

Why does oil float on the surface of water?

Back

Preview of the front of card 4

Card 5

Front

Vegetable oils are important foods. Which of these statements are true? i. Vegetable oils can be extracted from plants by pressing or by distillation. ii. Vegetable oils have a high energy content. iii. Vegetable oils can be used to make biofuels.

Back

Preview of the front of card 5
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