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Question

74 (iii) Write the name and formula of monomer of polyethylene.


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Solution

Part I - Name of monomer

Polyethene is a polymer made up of a chain of ethylene as its monomer units which are joined together to form long polymeric chains.

  • If polyethylene is made of a linear chain of its monomer (ethylene) units then it leads to the formation of High-density polyethylene
  • If the polyethylene is the main linear chain that also has side branches, then it leads to the formation of Low-density polyethylene.

Part II - Formula and reaction of monomer

  • The formula of ethylene molecule (monomer) is CH2=CH2.
  • The reaction of polymerization of polyethylene is shown below

nCH2=CH2EthylenePolymerise(CH2=CH2)nPolyethylene


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