A short section of a polymer molecule is shown below - VCE - SSCE Chemistry - Question 19 - 2006 - Paper 1
Question 19
A short section of a polymer molecule is shown below.
–CH₂–CF–CF₂–CH–CF–CH₂–CH–CF₂–CH₂–
This polymer could have been formed from
A. CF₂H₂ only.
B. CF₂CF₂ and CH₂H... show full transcript
Worked Solution & Example Answer:A short section of a polymer molecule is shown below - VCE - SSCE Chemistry - Question 19 - 2006 - Paper 1
Step 1
A. CF₂H₂ only.
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Answer
CF₂H₂ can only contribute hydrogen and fluorine, which does not account for the structure observed in the polymer.
Step 2
B. CF₂CF₂ and CH₂H₂.
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Answer
This option includes CF₂CF₂, which contributes to the fluorinated parts, and CH₂H₂ for the aliphatic segments, supporting the polymer's structure.
Step 3
C. CF₂CF₂ and CH₃CHCF₃.
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Answer
CF₂CF₂ contributes fluorinated sections, while CH₃CHCF₃ does not match the required structure due to the presence of multiple fluorine attachments.
Step 4
D. CH₃CHCF₂ and CF₂CHCF₂.
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Answer
This combination appropriately explains the presence of hydrocarbon and fluorinated units in the polymer structure.
