plant oils

Question 1

why can we extract oil from plants?

Answer 1

because some fruits and seeds contain a lot of oil

Question 2

what can we do with oil from plants?

Answer 2

use it for food or fuel

Question 3

how do you get oil from the plant?

Answer 3

• you crush the plant material between two metal plates and squash the oil out
• you can separate the oil from the plant material by a centrifuge or a solvent

Question 4

what vegetable oils can be used as fuels?

Answer 4

• biodiesel
• rapeseed oil
• soybean oil

Question 5

why are vegetable oils good as fuels?

Answer 5

they contain a lot of energy

Question 6

unsaturated oils contain c=c doubble bonds.

Answer 6

they also contain long chain molecules with lots of carbon atoms

Question 7

in term of doubble bonds, whats the difference between monounsaturated and polyunsaturated fats?

Answer 7

mono-unsaturated fats contain one c=c doubble bond where as a polyunsaturated fats contain more than one c=c doubble bond

Question 8

can unsaturated oils be hydrogenated?

Answer 8

yes- they are liquids at room temperature but can be hardened by reacting them with hydrogen in a nickel catalyst at about 60 degrees c