C6.2.2

Question 1

Alkene:

Answer 1

Unsaturated hydrocarbon containing a carbon-carbon double bond

Question 2

General formule of alkenes:

Answer 2

C_nH_2n

Question 3

What is the symbol for a single bond?

Answer 3

-

Question 4

What is the symbol for a double bond?

Answer 4

=

Question 5

Name the first 4 alkenes:

Answer 5

1. Ethene
2. Propene
3. Butene
4. Pentene

Question 6

What happened to methene?

Answer 6

Doesn’t exist

Question 7

Functional group:

Answer 7

Atom, group of atoms, or type of bond that determines the chemical reactions of an organic compound

Question 8

Functional group of an alkene:

Answer 8

C=C

Question 9

What reactions can alkenes participate in?

Answer 9

Combustion Reactions

Addition reactions (to form additional polymers)

Question 10

Show the reaction of ethene and bromine:

Answer 10

C₂H₄ + Br₂ → C₂H₄Br₂

Dibromoethane is produced

Question 11

Describe a basic test for unsaturation:

Answer 11

• Bromine reacts with alkenes but not alkanes
• Bromine water (dissolved bromine) is orange-brown
• Bromine water turns colorless when mixed with alkenes
• Remains orange-brown when mixed with alkanes

Question 12

What is required for an alkene to react with hydrogen?

Answer 12

A nickel catalyst

Question 13

What does a reaction between an alkene and hydrogen form?

Answer 13

An alkane