In a homologous series, physical properties such as melting and boiling points exhibit a gradation with increasing molecular mass. This trend is observed because larger molecules generally have stronger intermolecular forces, leading to higher melting and boiling points.

A homologous series is a group of organic compounds with similar chemical properties due to the presence of the same functional group, substituting hydrogen atoms in a carbon chain. Despite varying carbon chain lengths, the chemical behavior is primarily determined ...

Functional groups are specific arrangements of atoms within a molecule, and they are denoted by their free valency. These groups, containing heteroatoms, confer distinct properties to carbon compounds, independent of the carbon chain’s characteristics.

Elements replacing hydrogen in a hydrocarbon chain are called heteroatoms. These heteroatoms, including halogens, oxygen, nitrogen, and sulphur, form functional groups in compounds, imparting specific properties regardless of the carbon chain’s length and nature.

Carbon forms bonds not only with hydrogen but also with halogens, oxygen, nitrogen, and sulphur. These elements can replace hydrogen in a hydrocarbon chain, maintaining carbon’s valency.