9.2.1 Ethylene & polymers
1
Ethylene (ethene) contains a highly reactive double bond that supplies electrons to other reactants.
Ethylene can be readily transformed into many useful products.
Which of the following products is correctly matched with it use?
ethanol (disinfectant)
ethanoic acid (steriliser)
ethylene oxide (plastic)
polyethylene (food preservative)
2
Polystyrene is a hard rigid plastic that can be readily remoulded. The strength of this polymer is due to
extensive cross linking between the polystyrene chains
bulky side groups that prevent the chains slipping over one another
a linear packaging arrangement of polymer chains
a highly branched polymer chain structure
3
Catalytic cracking is used in the petrochemical industry to break down large hydrocarbons into smaller molecules. The following reaction is an example
C
10
H
22
®
C
8
H
18
+Z
What is the name of product Z?
ethane
ethene
propane
octane
4
The following monomer is used to make what series of products?
CD cases, petri dishes and screw driver handles
raincoats, waste water pipes and insulation for electrical wires
milk bottles, grocery carry bags and aerosol lids
cling wrap products, soft squeeze bottles and ice cream container lids
5
What type of reaction involves the opening the opening of a double bond in the monomer in order to join onto neighbouring monomers?
An addition reaction
A condensation reaction
An oxidation/ reduction reaction
A dehydration reactiion
6
What is the product X called which is obtained from the steam cracking of ethane?
C
2
H
6
X + H
2
methane
ethene
ethanol
ethyne
7
What is the systematic name of the following structure?
vinyl chloride
styrene
polyethylene
ethenylbenzene
8
What is the correct systematic name for the monomer used to produce polyvinylchloride or PVC?
vinyl chloride
chloroethane
chloroethene
1,1-dichloroethene
9
During the production of polyethylene two activated chains of varying length collide to produce a stable polymer chain. This step occurs at during the
initiation stage
propagation stage
termination stage
remoulding stage
10
What reagent could be used to readily distinguish cyclohexane from cyclohexane?
sodium hydrogen carbonate
bromine water
hydrochloric acid
sodium hydroxide solution
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