ChemistryChapter 15: Organic Chemistry
Reaction Types (organic Map) — Add / Elim / Sub
Alkene additions fill the extra bond.
Learning objectives
- Define add / elim / sub using accurate chemistry terms.
- Explain why add / elim / sub matters within reaction types (organic map).
- Apply the learning unit to an FBISE-style example, comparison, diagram, or calculation.
Definition
Alkene additions fill the extra bond. Elimination makes a double bond. Substitution keeps the chain length in simple school cases. Alkene addition; halogenoalkane substitution; alcohol oxidation — preview Ch16-18. This page separates the idea from the wider topic “REACTION TYPES (ORGANIC MAP)” so it can be revised and assessed on its own.
Important terms
- ADD / ELIM / SUB
- Alkene additions fill the extra bond.
- REACTION TYPES (ORGANIC MAP)
- Addition: two molecules become one (alkene + Br2).
Overview
Study this learning unit in three steps:
Key Idea
Alkene additions fill the extra bond. Elimination makes a double bond. Substitution keeps the chain length in simple school cases. Alkene addition; halogenoalkane substitution; alcohol oxidation — preview Ch16-18.
Examples Br2 water test · KOH alcoholic elim named · KOH aqueous sub named
Exam Application
Exam: alkene + Br2 is addition. haloalkane + aqueous alkali is substitution. haloalkane + hot alcoholic alkali is elimination (school). alcohol + acidified dichromate is oxidation (school).
Examples Br2 water test · KOH alcoholic elim named · KOH aqueous sub named
WHAT — REACTION TYPES (ORGANIC MAP) — ADD / ELIM / SUB
Alkene additions fill the extra bond. Elimination makes a double bond. Substitution keeps the chain length in simple school cases. Alkene addition; halogenoalkane substitution; alcohol oxidation — preview Ch16-18. This page separates the idea from the wider topic “REACTION TYPES (ORGANIC MAP)” so it can be revised and assessed on its own.
WHY — Why this topic matters
REACTION TYPES (ORGANIC MAP) — ADD / ELIM / SUB 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
Alkene additions fill the extra bond. Elimination makes a double bond. Substitution keeps the chain length in simple school cases. Alkene addition; halogenoalkane substitution; alcohol oxidation — preview Ch16-18. Examples: Br2 water test; KOH alcoholic elim named; KOH aqueous sub named. Exam use: Exam: alkene + Br2 is addition. haloalkane + aqueous alkali is substitution. haloalkane + hot alcoholic alkali is elimination (school). alcohol + acidified dichromate is oxidation (school).
Explanation
Alkene additions fill the extra bond. Elimination makes a double bond. Substitution keeps the chain length in simple school cases. Alkene addition; halogenoalkane substitution; alcohol oxidation — preview Ch16-18. Examples: Br2 water test; KOH alcoholic elim named; KOH aqueous sub named. Exam use: Exam: alkene + Br2 is addition. haloalkane + aqueous alkali is substitution. haloalkane + hot alcoholic alkali is elimination (school). alcohol + acidified dichromate is oxidation (school).
In simple words
Federal Board Class 11 Chemistry learning unit. Easy wording; no provincial-board material added.
Key points
- count molecules
- four named types
Exam preparation
Exam Focus
Quick revision
Revision Zone
Review the key facts, formulas and checks before you move on.Reaction Types (organic Map) — Add / Elim / Sub
Sticky Notes · Quick Revision
Core idea
- Alkene additions fill the extra bond. Elimination makes a double bond. Substitution keeps the chain length in simple school cases. Alkene addition; halogenoalkane substitution; alcohol oxidation — preview Ch16-18. This page separates the idea from the wider topic “REACTION TYPES (ORGANIC MAP)” so it can be revised and assessed on its own.
WHAT
- Alkene additions fill the extra bond.
WHY
- REACTION TYPES (ORGANIC MAP) — ADD / ELIM / SUB is an independent FBISE learning unit because students must use its definitions, conditions, equations, or trends separately in explanations and calculations.
HOW
- Alkene additions fill the extra bond. Elimination makes a double bond. Substitution keeps the chain length in simple school cases. Alkene addition; halogenoalkane substitution; alcohol oxidation — preview Ch16-18. Examples: Br2 water test; KOH alcoholic elim named; KOH aqueous sub named. Exam use: Exam: alkene + Br2 is addition. haloalkane + aqueous alkali is substitution. haloalkane + hot alcoholic alkali is elimination (school). alcohol + acidified dichromate is oxidation (school).
Common misconception
- Do not treat add / elim / sub as the same as every other part of reaction types (organic map); define this unit and use its own evidence, steps, or conditions.
FBISE exam check
- Define reaction types (organic map) — add / elim / sub, explain how it works, and support the answer with one relevant example.
60-second revision
- Alkene additions fill the extra bond.
- Br2 water test
- Exam link: count molecules.
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