4.1 polymer

what is the advantage of this type of pipe campared to metal pipe?

• strong and hard

• can with stand high pressure

• does not break easily

• does not corrode

which structural formula is a monomer for this polymer

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• 
• 

which substance is a natural polymer?

• polythene

• polypropene

• polyisoprene

• polyvinyl chlorode

Choose the best answer

• I and II

• II and III

• I, II and IV

• I, III and IV

choose the best answer

• A

• B

• C

• D

Polythene is a polymer that is formed from the combination of ethene molecules. Which of the following represents the process of the formation of polythene?

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• 
• 
• 

A long chain of repeating units (called monomers)

• monomer

• polymer

• dimer

Once formed, it can be heated and reformed over and over again

• thermoset plastic

• thermoplastic

• elastomer

Synthetic polymer are made from

• wood

• trees

• plastic

• fossil fuel

A polymer that is irreversibly hardened by curing, like polyurethane or Bakelite, is called ___

• thermoset plastic

• thermoplastic

• elastomer