All of the following molecules except CH₃CH₂CH₃ make up a homologous series.
What is Homologous Series ?
A homologous series is a series of compound having same general formula and same functional group.
What is the general formula of alkene and alkane ?
The general formula of alkane is CₙH₂ₙ₊₂
The general formula of alkene is CₙH₂ₙ
CH₃CH₂CH₃ (Propane) is the third homologous series of alkane which satisfies the general formula of alkane.
Thus from the above conclusion we can say that All of the following molecules except CH₃CH₂CH₃ make up a homologous series.
Learn more about the Homologous Series here: https://brainly.com/question/20700241
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