A homologous series is a family of compounds in which each member
- A. has the same molecular formula
- B. differs from the next by a CH2 group and shares the same general formula and functional group
- C. has the same physical properties
- D. contains the same number of carbon atoms
Explanation
Members share a general formula and a functional group, so their chemical properties are similar, while physical properties such as boiling point change gradually as the chain lengthens. The alkanes, with the general formula CnH2n+2, are the simplest example. Compounds with the same molecular formula but different structures are isomers, not members of a series.