Plant Oils

Question 1

What is the difference between saturated and unsaturated

Answer 1

Saturated : no double bond : bromine water stays red/ orange if added , carry a high risk of heart disease
Unsaturated : C=C double bond ; change bromine water colourless lower risks of heart disease

Question 2

How are plant oils obtained and used?

Answer 2

Plant oils can be crushed and pressed to release their oils
Vegetable like are used in foods
Lots of energy
Used in cooking as they have higher boiling points than water so they cook quicker
They can be used as fuel such as biodiesel

Question 3

How can vegetable oils be extracted from fruit and seeds?

Answer 3

Crushing
Pressing
Distilling

Question 4

Why are vegetable oils an important part of our diet?

Answer 4

They provide us with nutrient and energy

Question 5

Vegetable oils that contain double bonds can be detected by what?

Answer 5

Reactive with bromine water which chafed from Orange to colourless

Question 6

How can vegetables oils that are unsaturated be hardened?

Answer 6

React them with hydrogen, pass over a nickel catalyst and heat at 60 degrees

Question 7

What are hydrogenated oils?

Answer 7

Hydrogenated oils are vegetables like that have extra hydrogen in them, making them harder

Question 8

What are hydrogenated oils useful?

Answer 8

Higher melting poky and so are soils at room temperature, making them useful as spreads

Question 9

What foods contain hydrogenated oils and why?

Answer 9

Margarine - this hardens the vegetable oil, turning it more solid do it can be spread