Plant Oils And Their Uses

Question 1

Vegetable oils are made up of …….. Bonds.

Answer 1

Double carbon bonds

Question 2

How can vegetable oils be detected?

Answer 2

Bromine water

Question 3

Unsaturated fats ….. bromine water.

Answer 3

Decolourise

Question 4

Vegetable oils have a …. boiling point.

Answer 4

High

Question 5

The more double carbon bonds there are in a substance the lower its … point.

Answer 5

Melting

Question 6

What is hydrogenation?

Answer 6

The process in which hydrogen is used to harden vegetable oils.

Question 7

How does hydrogenation happen?

Answer 7

The unsaturated oil is heated its hydrogen at about 60C in the presence of nickel catalyst. A reaction takes place where the double bonds are removed

Question 8

What is it called when oil and water is mixed?

Answer 8

An emulsion

Question 9

What are emulsions?

Answer 9

Better texture, appearance, coating ability.

Question 10

What sort of things are emulsions used for?

Answer 10

Salad cream, ice cream, cosmetics, paints

Question 11

What’s hydrophilic mean?

Answer 11

Waterloving

Question 12

What’s hydrophobic mean?

Answer 12

Waterhating

Question 13

What does a hydrophilic particle mix with?

Answer 13

Water molecules

Question 14

What does hydrophobic molecules mix with?

Answer 14

Oil molecules

Question 15

What part of emulsifier molecule like the water and what part like the oil?

Answer 15

Head - water

Tail - oil