Topic 13.23 min read
13.2 Homologous Series
A homologous series is a series of related compounds in which any two adjacent members differ by a –CH₂– unit. Simple explanation: A homologous series is a family of organic compounds that differ from each other by one CH₂ group.
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13.2 Homologous Series
What is it?
A homologous series is a series of related compounds in which any two adjacent members differ by a –CH₂– unit. Simple explanation: A homologous series is a family of organic compounds that differ from each other by one CH₂ group.
In simple words
13.2 Homologous Series is a core idea in this chapter. Learn the meaning first, then the main parts, then one clear example.
Recommended for Class 9
Full school-level explanation
A homologous series is a series of related compounds in which any two adjacent members differ by a –CH₂– unit. Simple explanation: A homologous series is a family of organic compounds that differ from each other by one CH₂ group.
Why it matters
Understanding 13.2 Homologous Series helps you answer definition, explanation, and application questions in this chapter.
Deeper understanding
Go deeper on 13.2 Homologous Series: connect the definition to reasons, relationships, exceptions, and exam wording.
Exam focus
Quick revision
- A homologous series is a series of related compounds in which any two adjacent members differ by a –CH₂– unit. *
For long answers on 13.2 Homologous Series: define clearly → explain the main parts → give one example → state one exam caution.
Exam Focus
Exam Focus
Important points
- A homologous series is a series of related compounds in which any two adjacent members differ by a –CH₂– unit. *
Common exam traps
- Do not write about 13.2 Homologous Series without a clear definition.
- Do not mix this idea with a neighbouring chapter concept.
Long question structure
Definition → key parts → example → exam caution
Common Mistakes
Common Mistakes
- Mistake
Do not write about 13.2 Homologous Series without a clear definition.
- Mistake
Do not mix this idea with a neighbouring chapter concept.
- Mistake
Do not list facts without showing how they connect.
Revision Zone
60-Second Revision
Quick cues from this topic — use them for last-minute revision.
A homologous series is a series of related compounds in which any two adjacent members differ by a –CH₂– unit. *
A homologous series is a series of related compounds in which any two adjacent members differ by a –CH₂– unit. Simple explanation: A homologous series
- Definition
- A homologous series is a series of related compounds in which any two adjacent members differ by a –CH₂– unit. Simple explanation: A homologous series
- Critical warning
- Do not write about 13.2 Homologous Series without a clear definition.
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Exam Practice
Define
Q1. Define 13.2 Homologous Series.
Explain
Q2. Explain the main ideas in 13.2 Homologous Series.
Example
Q3. Give one clear example of 13.2 Homologous Series and say why it fits.
Mistake
Q4. State one common mistake students make about 13.2 Homologous Series.
Exam note
Q5. Write a short exam note on 13.2 Homologous Series: definition, two points, one example.
Sources & References
School-standard facts for Matric and Intermediate. Original explanations — not copied from textbooks.