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Polymerisation (addition, Names) — Repeat Unit
Open the double bond, brackets, n. Side groups stay. PTFE from tetrafluoroethene named if in the book. Repeat unit drawn in brackets with n; no small molecule lost. This page separates the idea from the wider topic “POLYMERISATION (ADDITION, NAMES)” so it can be revised and assessed on its own.
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Polymerisation (addition, Names) — Repeat Unit
What is it?
Open the double bond, brackets, n. Side groups stay. PTFE from tetrafluoroethene named if in the book. Repeat unit drawn in brackets with n; no small molecule lost. This page separates the idea from the wider topic “POLYMERISATION (ADDITION, NAMES)” so it can be revised and assessed on its own.
In simple words
- Open the double bond, brackets, n.
- PE named
- Exam link: open C=C.
Important terms
REPEAT UNIT: Open the double bond, brackets, n.
POLYMERISATION (ADDITION, NAMES): Ethene many times: poly(ethene), addition polymer, no extra product.
What you should learn
- Define repeat unit using accurate chemistry terms.
- Explain why repeat unit matters within polymerisation (addition, names).
- Apply the learning unit to an FBISE-style example, comparison, diagram, or calculation.
Examples
- PE named
- PVC named
- n large
KEY IDEA
Open the double bond, brackets, n. Side groups stay. PTFE from tetrafluoroethene named if in the book. Repeat unit drawn in brackets with n; no small molecule lost.
EXAM APPLICATION
Exam polymer: many ethene molecules add repeat unit -CH2-CH2- name poly(ethene); conditions are names, not a plant
Recommended for Class 11
Full school-level explanation
Open the double bond, brackets, n. Side groups stay. PTFE from tetrafluoroethene named if in the book. Repeat unit drawn in brackets with n; no small molecule lost. This page separates the idea from the wider topic “POLYMERISATION (ADDITION, NAMES)” so it can be revised and assessed on its own.
Study this learning unit in three steps:
WHAT — POLYMERISATION (ADDITION, NAMES) — REPEAT UNIT
Open the double bond, brackets, n. Side groups stay. PTFE from tetrafluoroethene named if in the book. Repeat unit drawn in brackets with n; no small molecule lost. This page separates the idea from the wider topic “POLYMERISATION (ADDITION, NAMES)” so it can be revised and assessed on its own.
WHY — Why this topic matters
POLYMERISATION (ADDITION, NAMES) — REPEAT UNIT is an independent FBISE learning unit because students must use its definitions, conditions, equations, or trends separately in explanations and calculations.
HOW — How it works
Open the double bond, brackets, n. Side groups stay. PTFE from tetrafluoroethene named if in the book. Repeat unit drawn in brackets with n; no small molecule lost. Examples: PE named; PVC named; n large. Exam use: Exam polymer: many ethene molecules add repeat unit -CH2-CH2- name poly(ethene); conditions are names, not a plant
KEY IDEA
Open the double bond, brackets, n. Side groups stay. PTFE from tetrafluoroethene named if in the book. Repeat unit drawn in brackets with n; no small molecule lost.
Remember
- open C=C
Examples
- PE named
- PVC named
- n large
EXAM APPLICATION
Exam polymer: many ethene molecules add repeat unit -CH2-CH2- name poly(ethene); conditions are names, not a plant
Remember
- repeat unit
Examples
- PE named
- PVC named
- n large
Remember
- open C=C
- repeat unit
- Federal Board only
- open C=C
- repeat unit
- open C=C
- independent learning unit
- open C=C
How the ideas connect
Open the double bond, brackets, n. Side groups stay. PTFE from tetrafluoroethene named if in the book. Repeat unit drawn in brackets with n; no small molecule lost. Examples: PE named; PVC named; n large. Exam use: Exam polymer: many ethene molecules add repeat unit -CH2-CH2- name poly(ethene); conditions are names, not a plant
Deeper understanding
Go beyond memorising Polymerisation (addition, Names) — Repeat Unit. Connect the definition to reasons, relationships, exceptions, and exam wording.
How the ideas connect
Open the double bond, brackets, n. Side groups stay. PTFE from tetrafluoroethene named if in the book. Repeat unit drawn in brackets with n; no small molecule lost. Examples: PE named; PVC named; n large. Exam use: Exam polymer: many ethene molecules add repeat unit -CH2-CH2- name poly(ethene); conditions are names, not a plant
Common mistakes
Exam focus
Core idea
WHAT
WHY
HOW
Exam focus
Quick revision
- open C=C
- repeat unit
- Federal Board only
- REPEAT UNIT: Open the double bond, brackets, n.
- POLYMERISATION (ADDITION, NAMES): Ethene many times: poly(ethene), addition polymer, no extra product.
- WHAT — POLYMERISATION (ADDITION, NAMES) — REPEAT UNIT: Open the double bond, brackets, n. Side groups stay. PTFE from tetrafluoroethene named if in the boo
Federal Board Class 11 Chemistry learning unit. Easy wording; no provincial-board material added.
For long answers on Polymerisation (addition, Names) — Repeat Unit: define clearly → explain the main parts → give one example → state one exam caution.
Exam Focus
Exam Focus
Important points
- open C=C
- repeat unit
- Federal Board only
- REPEAT UNIT: Open the double bond, brackets, n.
Important formulas
- open C=C
- repeat unit
- Federal Board only
Common exam traps
- Do not treat repeat unit as the same as every other part of polymerisation (addition, names); define this unit and use its own evidence, steps, or conditions.
- Do not memorise a label alone; connect the definition to a process, structure, condition, equation, or example.
Long question structure
Definition → key parts → example → exam caution
Common Mistakes
Common Mistakes
- Mistake
Do not treat repeat unit as the same as every other part of polymerisation (addition, names); define this unit and use its own evidence, steps, or conditions.
- Mistake
Do not memorise a label alone; connect the definition to a process, structure, condition, equation, or example.
- Mistake
Do not use provincial-board wording or add material outside the Federal Board Class 11 scope.
- Mistake
Federal Board Class 11 Chemistry learning unit. Easy wording; no provincial-board material added.
Revision Zone
60-Second Revision
Quick cues from this topic — use them for last-minute revision.
open C=C
repeat unit
Federal Board only
REPEAT UNIT: Open the double bond, brackets, n.
Open the double bond, brackets, n. Side groups stay. PTFE from tetrafluoroethene named if in the book. Repeat unit drawn in brackets with n; no small molecule l
open C=C
- Definition
- Open the double bond, brackets, n. Side groups stay. PTFE from tetrafluoroethene named if in the book. Repeat unit drawn in brackets with n; no small molecule l
- Formula
- open C=C
- Example
- PE named
- Critical warning
- Do not treat repeat unit as the same as every other part of polymerisation (addition, names); define this unit and use i
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Exam Practice
Define
Q1. Define Polymerisation (addition, Names) — Repeat Unit.
Explain
Q2. Explain: KEY IDEA.
Example
Q3. Give one clear example of Polymerisation (addition, Names) — Repeat Unit and say why it fits.
Mistake
Q4. State one common mistake students make about Polymerisation (addition, Names) — Repeat Unit.
Exam note
Q5. Write a short exam note on Polymerisation (addition, Names) — Repeat Unit: definition, two points, one example.
Sources & References
School-standard facts for Matric and Intermediate. Original explanations — not copied from textbooks.