CIE iGCSE Co-Ordinated Science C11.7 Polymers Exam Style Questions Paper 1
Question
Poly(ethene) is a saturated hydrocarbon. It is formed by the addition polymerisation of ethene, H₂C=CH₂. Which diagram shows part of a molecule of poly(ethene)?
▶️Answer/Explanation
Answer: D
Explanation: Poly(ethene) is formed by the addition polymerisation of ethene, resulting in a long chain of -CH₂-CH₂- units. The correct structure is -CH₂-CH₂-CH₂-CH₂-.
Question
Which row shows the structure of the monomer used to make poly(ethene) and the structure of a section of poly(ethene)?
▶️Answer/Explanation
Answer: C
Explanation: The monomer for poly(ethene) is ethene (H₂C=CH₂), and the polymer structure is a repeating unit of (-CH₂-CH₂-)ₙ.
Question
Which statement about poly(ethene) is correct?
A It is an alkene.
B It is formed in a reaction called cracking.
C It is obtained from the bitumen fraction of petroleum.
D It is made by an addition reaction.
▶️Answer/Explanation
Ans 😀
Question
Polymers are long chain molecules made from smaller molecules.
What are these smaller molecules called?
(A) alkanes
(B) atoms
(C) components
(D) monomers
▶️Answer/Explanation
Ans: D