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
Question
Which statement about poly(ethene) is correct?
(A) It always contains less than 12 carbon atoms.
(B) It is formed from ethane.
(C) It is formed from ethene.
(D) It occurs naturally.
▶️Answer/Explanation
Ans : C
Question
Poly(ethene) is made from ethene by addition polymerization.
Which word describes ethene in this process?
(A) fuel
(B) catalyst
(C) monomer
(D) solvent
▶️Answer/Explanation
Ans: C
Question
Poly(ethene) is made from ethene by the process of addition polymerisation. Which word describes ethene in this process?
A. Fuel
B. Catalyst
C. Monomer
D. Solvent
▶️Answer/Explanation
Answer: C. Monomer.
Explanation: Ehene is the monomer used in the polymerisation process to form poly(ethene).
Question
Which statement about the manufacture of polymers is correct?
A. Polymers are made by breaking long-chain molecules into shorter chain ones.
B. Polymers are made by joining polymers together.
C. Polymers are made by fractional distillation of petroleum.
D. Polymers are made by joining short-chain molecules together.
▶️Answer/Explanation
Answer: D. Polymers are made by joining short-chain molecules together.
Explanation: Polymers are formed by joining monomers (short-chain molecules) together through a process called polymerisation. This can occur via addition or condensation reactions.
Question
Which type of reaction is represented by the equation?
A addition polymerisation
B cracking
C fermentation
D reduction
▶️Answer/Explanation
Answer: A
Explanation: The equation represents addition polymerisation, where monomers join together to form a polymer.
Question
Which statements about poly(ethene) molecules are correct?
1. They are long chains formed from many monomer units.
2. They are made by addition polymerisation.
3. They contain many double bonds.
A. 1 and 2 only
B. 1 and 3 only
C. 2 and 3 only
D. 1, 2 and 3
▶️Answer/Explanation
Answer: A
Explanation: Poly(ethene) molecules are long chains formed from many monomer units (ethene) and are made by addition polymerisation. They do not contain double bonds in the polymer chain.
Question
Which two statements describe addition polymers?
- They are large molecules.
- They contain carbon to carbon double bonds.
- They are small molecules.
- They are made from small units.
A. 1 and 2
B. 1 and 4
C. 2 and 3
D. 3 and 4
▶️Answer/Explanation
Answer: B
Explanation: Addition polymers are large molecules made from small repeating units (monomers). They do not necessarily contain carbon-carbon double bonds in the final polymer structure.