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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.
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Reaction Types (organic Map) — Add / Elim / Sub
What is it?
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.
In simple words
- Alkene additions fill the extra bond.
- Br2 water test
- Exam link: count molecules.
Important terms
ADD / ELIM / SUB: Alkene additions fill the extra bond.
REACTION TYPES (ORGANIC MAP): Addition: two molecules become one (alkene + Br2).
What you should learn
- 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.
Examples
- Br2 water test
- KOH alcoholic elim named
- KOH aqueous sub named
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.
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).
Recommended for Class 11
Full school-level 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. This page separates the idea from the wider topic “REACTION TYPES (ORGANIC MAP)” so it can be revised and assessed on its own.
Study this learning unit in three steps:
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).
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.
Remember
- count molecules
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).
Remember
- four named types
Examples
- Br2 water test
- KOH alcoholic elim named
- KOH aqueous sub named
Remember
- count molecules
- four named types
- Federal Board only
- count molecules
- four named types
- count molecules
- independent learning unit
- count molecules
How the ideas connect
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).
Deeper understanding
Go beyond memorising Reaction Types (organic Map) — Add / Elim / Sub. Connect the definition to reasons, relationships, exceptions, and exam wording.
How the ideas connect
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 mistakes
Exam focus
Core idea
WHAT
WHY
HOW
Exam focus
Quick revision
- count molecules
- four named types
- Federal Board only
- ADD / ELIM / SUB: Alkene additions fill the extra bond.
- REACTION TYPES (ORGANIC MAP): Addition: two molecules become one (alkene + Br2).
- WHAT — REACTION TYPES (ORGANIC MAP) — ADD / ELIM / SUB: Alkene additions fill the extra bond. Elimination makes a double bond. Substitution keeps the chain
Federal Board Class 11 Chemistry learning unit. Easy wording; no provincial-board material added.
For long answers on Reaction Types (organic Map) — Add / Elim / Sub: define clearly → explain the main parts → give one example → state one exam caution.
Exam Focus
Exam Focus
Important points
- count molecules
- four named types
- Federal Board only
- ADD / ELIM / SUB: Alkene additions fill the extra bond.
Important formulas
- count molecules
- four named types
- Federal Board only
Common exam traps
- 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.
- 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 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.
- 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.
count molecules
four named types
Federal Board only
ADD / ELIM / SUB: Alkene additions fill the extra bond.
Alkene additions fill the extra bond. Elimination makes a double bond. Substitution keeps the chain length in simple school cases. Alkene addition; halogenoalka
- Definition
- Alkene additions fill the extra bond. Elimination makes a double bond. Substitution keeps the chain length in simple school cases. Alkene addition; halogenoalka
- Example
- Br2 water test
- Critical warning
- Do not treat add / elim / sub as the same as every other part of reaction types (organic map); define this unit and use
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Exam Practice
Define
Q1. Define Reaction Types (organic Map) — Add / Elim / Sub.
Explain
Q2. Explain: KEY IDEA.
Example
Q3. Give one clear example of Reaction Types (organic Map) — Add / Elim / Sub and say why it fits.
Mistake
Q4. State one common mistake students make about Reaction Types (organic Map) — Add / Elim / Sub.
Exam note
Q5. Write a short exam note on Reaction Types (organic Map) — Add / Elim / Sub: definition, two points, one example.
Sources & References
School-standard facts for Matric and Intermediate. Original explanations — not copied from textbooks.