Topic 6 - 6.3 - Alkenes and Addition Reactions

Question 1

Alkenes are
a. saturated
b. unsaturated

Answer 1

b. unsaturated

Question 2

What does being unsaturated allow alkenes to do?

Answer 2

Allows them to take part in addition reactions.

Question 3

Define the term ‘addition reaction’ AND name the 5 types.

Answer 3

• When one molecule reacts with another to form a larger molecule with no other products.

1. Hydrogenation
2. Halogenation
3. Bromination (part of halogenation)
4. Hydration
5. Addition polymerisation

Question 4

Describe the process of Hydrogenation

Answer 4

Alkenes react with hydrogen to produce alkanes

Question 5

Describe the process of Halogenation

Answer 5

Adding halogens to alkenes to make alkanes

Question 6

Describe the process of Bromination

Answer 6

Used to test for alkenes(/double bonds) because only alkenes cause bromine to decolourise rapidly.

Double bonds present? = Bromine goes from orange to colourless

Question 7

Describe the process of Hydration

Answer 7

Water is added to alkenes to produce alcohol

Question 8

Finish the sentence

Alkenes are ____ in water, and ________ in organic solvents

Answer 8

insoluble, soluble

Question 9

How do alkenes form isomers?

Answer 9

Moving the position of the double bond.

Question 10

List the first 8 alkenes

Answer 10

1. Ethene
2. Propene
3. Butene
4. Pentene
5. Hexene
6. Heptene
7. Octene
8. Nonene