Question

multiple choice 2 points
a series of compounds, like the n - alkanes, that differ only by the number of groups, is called a(n) ______ series.
isomer
functional group
unsaturated
homologous

Explanation:

In chemistry, a homologous series consists of compounds like n - alkanes that differ only by the number of repeating groups (such as $-CH_2-$ units). Isomers have the same formula but different structures. A functional group is a specific group of atoms. Unsaturated refers to compounds with double or triple bonds.

Answer:

D. homologous