Which of the following statements correctly describes a homologous series?

Correct option is C

The correct answer is (c) The members of a homologous series have almost the same chemical properties due to the same functional group.

Explanation:

• A homologous series is a group of organic compounds that have the same functional group and similar chemical properties, but they differ by a CH₂ unit in their molecular formula.
• This results in compounds having almost the same chemical properties, as the functional group determines the chemical behavior of the molecules.
  

Information Booster

• Functional Group: The functional group is a specific group of atoms within a molecule that determines its characteristic reactions.
• Examples of Homologous Series: Examples include alkanes (with the functional group -CH3), alcohols (with -OH), and carboxylic acids (with -COOH).
• Gradation in Physical Properties: Although the chemical properties are similar, the physical properties (such as boiling point, melting point, and solubility) change gradually within the series due to the increase in molecular size.