Which statement correctly identifies the monomer used to make polytetrafluoroethene?

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Study for the IGCSE Organic Chemistry Test. Engage with flashcards and multiple-choice questions, complete with hints and detailed explanations. Prepare effectively to excel in your exam!

Multiple Choice

Which statement correctly identifies the monomer used to make polytetrafluoroethene?

Explanation:
Polymers formed by addition polymerization come from monomers that have a carbon–carbon double bond, which opens up to link many units together. Polytetrafluoroethene is made by polymerizing tetrafluoroethene, whose structure is CF2=CF2. When it polymerizes, the double bond opens and the repeating unit becomes -CF2-CF2-, building the PTFE chain with fluorinated carbons along the backbone. The other choices would lead to different polymers: ethene would give polyethylene, propene would give polypropene, and butene would give polybutene.

Polymers formed by addition polymerization come from monomers that have a carbon–carbon double bond, which opens up to link many units together. Polytetrafluoroethene is made by polymerizing tetrafluoroethene, whose structure is CF2=CF2. When it polymerizes, the double bond opens and the repeating unit becomes -CF2-CF2-, building the PTFE chain with fluorinated carbons along the backbone. The other choices would lead to different polymers: ethene would give polyethylene, propene would give polypropene, and butene would give polybutene.

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