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Question
Which of the following does not belong to the same homologous series?
Options
CH4
C2 H6
C3 H8
C4 H8
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Solution
C4 H8
Explanation -
The succeeding members of the homologues series differ by a —CH2 - unit. The general formula for the alkane is CnH2n+2. Methane (CH4), ethane (C2H6) and propane (C3H8) are members of homologues series for alkanes while butene (C4H8) is the fourth member of homologues series for alkene.
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