Polymers — GCSE Chemistry Revision
Revise Polymers for GCSE Chemistry. Step-by-step explanation, worked examples, common mistakes and exam-style practice aligned to AQA, Edexcel, OCR, WJEC, Eduqas, CCEA, Cambridge International (CIE), SQA, IB, AP.
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Go to Ionic BondingWhat is Polymers?
Polymers are large molecules made up of many small, repeating units called monomers. They can be natural (like DNA) or synthetic (like poly(ethene)). The properties of a polymer depend on the monomer it's made from and the conditions under which it is made.
Board notes: Polymers are a major topic in organic chemistry. All boards expect you to understand the concept of monomers and polymers, be able to draw repeating units for addition polymers, and know the uses of some common polymers. Condensation polymerisation is typically a higher-tier topic.
Step-by-step explanationWorked example
The monomer ethene (CH₂=CH₂) can be polymerised to form the polymer poly(ethene). The double bond in each ethene molecule breaks, and the molecules join together to form a long saturated chain: -[CH₂-CH₂]n-.
Mini lesson for Polymers
1. Understand the core idea
Polymers are large molecules made up of many small, repeating units called monomers. They can be natural (like DNA) or synthetic (like poly(ethene)).
Can you explain Polymers without copying the notes?
2. Turn it into marks
The monomer ethene (CH₂=CH₂) can be polymerised to form the polymer poly(ethene). The double bond in each ethene molecule breaks, and the molecules join together to form a long saturated chain: -[CH₂-CH₂]n-.
Underline the method, evidence, or command-word move that would earn credit in GCSE Bonding & Structure.
3. Fix the likely mark leak
Watch for this mistake: Confusing monomers and polymers. A monomer is a single unit; a polymer is a long chain of monomers.
Write one correction rule before doing another practice question.
Practise this topic
Jump into adaptive, exam-style questions for Polymers. Free to start; sign in to save progress.
Polymers practice questions
These are original StudyVector questions for revision practice. They are not official exam-board questions.
Question 1
In one GCSE sentence, explain what Polymers is testing.
Answer: Polymers are large molecules made up of many small, repeating units called monomers. They can be natural (like DNA) or synthetic (like poly(ethene)).
Mark focus: Precise definition and topic focus.
Question 2
A Polymers question uses an unfamiliar context. What should the answer do before adding detail?
Answer: It should name the process, variable, equation, particle model, or evidence being tested, then explain the result using precise scientific vocabulary.
Mark focus: Method selection and command-word control.
Question 3
A student makes this mistake: "Confusing monomers and polymers. A monomer is a single unit; a polymer is a long chain of monomers." What should their next repair task be?
Answer: Do one Polymers question and review the mistake type.
Mark focus: Error correction and next-step practice.
Polymers flashcards
Core idea
What is the main idea in Polymers?
Polymers are large molecules made up of many small, repeating units called monomers. They can be natural (like DNA) or synthetic (like poly(ethene)).
Common mistake
What mistake should you avoid in Polymers?
Confusing monomers and polymers. A monomer is a single unit; a polymer is a long chain of monomers.
Practice
What is one useful practice task for Polymers?
Answer one Polymers question and review the mistake type.
Exam board
How should you use board notes for Polymers?
Polymers are a major topic in organic chemistry. All boards expect you to understand the concept of monomers and polymers, be able to draw repeating units for addition polymers, and know the uses of some common polymers.
Common mistakes
- 1Confusing monomers and polymers. A monomer is a single unit; a polymer is a long chain of monomers.
- 2Not being able to draw the repeating unit of a polymer from its monomer, or vice versa. Remember to break the double bond in the monomer to form the single bonds in the polymer chain.
- 3Forgetting the names of common polymers and their uses, such as poly(ethene) for plastic bags and PVC for window frames.
Polymers exam questions
Exam-style questions for Polymers with mark-scheme style solutions and timing practice. Aligned to AQA, Edexcel, OCR, WJEC, Eduqas, CCEA, Cambridge International (CIE), SQA, IB, AP specifications.
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Step-by-step method
Step-by-step explanation
4 steps · Worked method for Polymers
Core concept
Polymers are large molecules made up of many small, repeating units called monomers. They can be natural (like DNA) or synthetic (like poly(ethene)). The properties of a polymer depend on the monomer …
Frequently asked questions
What is the difference between addition and condensation polymerisation?
In addition polymerisation, monomers add to each other in such a way that the polymer contains all the atoms of the monomer unit. In condensation polymerisation, a small molecule, such as water, is eliminated each time a monomer unit is added.
Are all plastics polymers?
Yes, all plastics are polymers, but not all polymers are plastics. The term 'plastic' refers to synthetic polymers that can be moulded or shaped.