What Is Homologous Series?

By Charlotte Miller

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In the realm of organic chemistry, the concept of a homologous series serves as a foundational principle, offering insights into the structural hierarchy of compounds. This article delves into the intricacies of homologous series, examining its definition, examples, and its significance in the study of carbon compounds.

What Is Homologous Series?

A homologous series is a group of organic compounds with similar structural features, possessing a recurring pattern in their molecular formula. These compounds share a common functional group and exhibit a gradual increase in molecular size, resulting in analogous chemical properties.

What Is Homologous Series In Chemistry?

In the domain of chemistry, a homologous series is a crucial concept that aids in the systematic classification of organic compounds. It highlights the structural relationships between different members of the series, facilitating a deeper understanding of their properties and behavior.

What Is Homologous Series With Example?

To grasp the concept, consider the homologous series of alkanes, where each member has the general formula CₙH₂ₙ₊₂. For example, methane (CH₄), ethane (C₂H₆), and propane (C₃H₈) are part of this series, showcasing a consistent pattern in molecular structure.

What Is Homologous Series Class 10 With Examples?

In Class 10 chemistry, students often encounter homologous series as part of their curriculum. Exploring examples like alkanes, alkenes, and alkynes helps them understand the recurring structural patterns and functional groups within these series.

Types Of Homologous Series:

Homologous series can be categorized based on the type of functional group present. Common types include alkanes, alkenes, alkynes, alcohols, and carboxylic acids, each exhibiting a distinct set of properties while adhering to the homologous pattern.

Homologous Series Of Alkenes:

The homologous series of alkenes follows the general formula CₙH₂ₙ, where n represents the number of carbon atoms. Ethene (C₂H₄), propene (C₃H₆), and butene (C₄H₈) are examples, highlighting the systematic increase in carbon and hydrogen atoms.

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What Is Homologous Series Of Carbon Compounds?

Homologous series of carbon compounds encompass a broad range of organic substances, including alkanes, alkenes, and alkynes. These series share a consistent molecular pattern, fostering a comprehensive understanding of carbon-based structures.

Characteristics Of Homologous Series:

Several key characteristics define homologous series:

  • Same Functional Group: Members share a common functional group, influencing their chemical behavior.
  • Gradual Increase in Molecular Size: Successive compounds exhibit a continuous increase in the number of carbon atoms and hydrogen atoms in their molecular formula.
  • Similar Chemical Properties: Compounds within a homologous series display analogous chemical properties due to their shared structural features.


In conclusion, homologous series serve as an invaluable tool in the study of organic chemistry, offering a systematic approach to understanding the structure and properties of diverse carbon compounds. From alkanes to alcohols, the recurring patterns within these series provide a framework for unraveling the complexities of organic molecules, contributing to the foundational knowledge of budding chemists and researchers alike.


What Is Meant By Homologous Series?

A homologous series is a collection of compounds with the same general formula that differ only in the carbon chain length. Compounds in a homologous series often have a fixed set of functional groups, resulting in chemical and physical properties that are comparable.

What Is A Homologous Series Gcse?

A homologous series is a group of chemicals which have similar chemical properties and can be represented by a general formula.

What Is A Homologous Series Bbc Bitesize?

A homologous series is a family of hydrocarbons with similar chemical properties who share the same general formula.

What Is Homologous Series In Very Short Answer?

A group of carbon compound having same general formula and same functional group is called homologous series. The members of homologous series are called homologue.

I Have Covered All The Following Queries And Topics In The Above Article

What Is Homologous Series With Example

What Is Homologous Series In Organic Compounds

What Is Homologous Series In Chemistry

What Is Homologous Series Class 10 With Examples

Types Of Homologous Series

Homologous Series Of Alkenes

What Is Homologous Series Of Carbon Compounds

Characteristics Of Homologous Series

What Is Homologous Series