vegetable oil

Question 1

how do we extract lavender oil

Answer 1

1. plants are put into water and then boiled
2. oil and water evaporate
3. collect and condense the water and oil
4. water and other impurities are removed

Question 2

are vegetable oils important

Answer 2

yes , provide nutrients and have high energy content

also make a good sources of biofuels like biodiesel

Question 3

what’s the difference between cooking foods in oil compared to water

Answer 3

• food cooks quicker in oil
• food is crispier and a different colour
• inside of food should be softer
• not as healthy

Question 4

what are hydrogenated oils and what are they used for

Answer 4

oils that have been hardened

used for spreads,cakes, biscuit and pastry

Question 5

what is hardening

Answer 5

changing a vegetable oil into something that is a sold at room tempreture

they have a higher melting point than vegetable oils

Question 6

how do you harden a vegetable oil

Answer 6

add hydrogen to the oil (replaced the c=c bonds) and makes them c-c single bonds

must use a nickel catalyst at about 60*C!!!

Question 7

how do we extract oils from a rapeseed plant

Answer 7

1. find oils in deed of the plant
2. seeds are then crushed and pressed
3. impurities are removed from the oil

Question 8

does hardening make oil healthier

Answer 8

no

adding hydrogen to unsaturated fat reduces the number of C=C

so there will be less saturated fat available and more saturated fat instead

Question 9

what are used for plant oils

Answer 9

• converted into consumer products
• can be hardened to make MARGERINE
• biofuels can be produced from them

Question 10

what would cook food faster out of water and oil and why

Answer 10

oil because it has a higher boiling point so can cooks foods at higher tempreture a meaning they cook faster

Question 11

what are the effects of hardening

Answer 11

the hydrogenated oils have higher melting points so are solids at room tempreture

so useful as spreads and in cakes