Question

what are homollogeous series​

Answer 1

A homologous series is a series of compounds with the same general formula, usually varying by a single parameter such as the length of a carbon chain. Compounds within a homologous series typically have a fixed set of functional groups that gives them similar chemical and physical properties.

Answer 2

the series in which similar chemical properties and each unit is differ from -CH2 unit is called homollogeous series.

example : CH4 , C2H6, C3H8 are the members of alkane family.