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The repeating unit of a polymer is shown - AQA - A-Level Chemistry - Question 21 - 2018 - Paper 3
Question 21
The repeating unit of a polymer is shown. O || --C(CH₃)₂CONH(CH₂)₂N-- Which monomer or pair of monomers could be used to make this polymer? A ClO(C₃H₇)N... show full transcript
Worked Solution & Example Answer:The repeating unit of a polymer is shown - AQA - A-Level Chemistry - Question 21 - 2018 - Paper 3
Step 1
Which monomer or pair of monomers could be used to make this polymer?
Answer
To identify the correct monomer or pair of monomers that could be used to synthesize the given polymer, we first analyze the repeating unit provided:
The structure indicates that the polymer is formed by linking together units with amine and carbonyl functionalities.
The choices provided are:
A. ClO(C₃H₇)NH₂ only: This would provide the amine but lacks the necessary carbonyl group for polymer formation. B. ClO(C₃H₇)COCl only: This contains a carbonyl but does not provide the required amine for polymerization. C. ClO(C₃H₇)COCl and H₂N(CH₂)₂NH₂: This pair includes both the carbonyl and amine functionalities needed to create the polymer repeating unit, thus making it the correct choice. D. ClO(C₃H₇)COCl and H₂N(CH₂)₂N: While it contains a carbonyl and an amine, it does not perfectly align with the amine linking necessary for polymerization as in option C.
Thus, the correct answer is option C: ClO(C₃H₇)COCl and H₂N(CH₂)₂NH₂.