Alkenes, reactions and polymers.

Which of these is an alkene ?

• 
• 
• 

name this molecule

• propene

• propane

• pentene

• propanol

How are alkenes made ?

• catalytic cracking

• fractional distillation

• addition reactions

What are alkenes mostly used for?

• burning as fuels

• making polymers

C₂H₆ + Cl₂ --> C₂H₅Cl + HCl

Which type of reaction is this ?

• addition

• substitution

• polymerisation

• thermal decomposition

The reaction between ethane and chlorine is shown

C₂H₆ + Cl₂ --> C₂H₅Cl + HCl

What is the essential condition for this reaction?

• Room temperature

• high pressure

• infra red light

• ultra violet light

What is the general formula of alkenes ?

• CH₂

• C_nH_2n

• C_nH_2n+2

• C_nH_n

The equation shows the reaction between ethene and bromine

C₂H₄ + Br₂ --> C₂H₄Br₂

Which type of reaction is this ?

• addition

• substitution

• polymerisation

• thermal decomposition

What type of reaction is this?

• chain linking

• substitution

• addition polymerisation

• oxidation

the diagram shows the repeat unit of a polymer.

what is the monomer?

• ethene

• propane

• propene

• pentene