ChemistryChapter 16: Hydrocarbons
Polymerisation (addition, Names) — Repeat Unit
Open the double bond, brackets, n.
Learning objectives
- 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.
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 lost. This page separates the idea from the wider topic “POLYMERISATION (ADDITION, NAMES)” so it can be revised and assessed on its own.
Important terms
- REPEAT UNIT
- Open the double bond, brackets, n.
- POLYMERISATION (ADDITION, NAMES)
- Ethene many times: poly(ethene), addition polymer, no extra product.
Relationship
- open C=C
Overview
Study this learning unit in three steps:
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.
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
Examples PE named · PVC named · n large
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
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. 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
In simple words
Federal Board Class 11 Chemistry learning unit. Easy wording; no provincial-board material added.
Key points
- open C=C
- repeat unit
Exam preparation
Exam Focus
Quick revision
Revision Zone
Review the key facts, formulas and checks before you move on.Polymerisation (addition, Names) — Repeat Unit
Sticky Notes · Quick Revision
Core 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. This page separates the idea from the wider topic “POLYMERISATION (ADDITION, NAMES)” so it can be revised and assessed on its own.
WHAT
- Open the double bond, brackets, n.
WHY
- 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
- 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 misconception
- 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.
FBISE exam check
- Define polymerisation (addition, names) — repeat unit, explain how it works, and support the answer with one relevant example.
60-second revision
- Open the double bond, brackets, n.
- PE named
- Exam link: open C=C.
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