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Question

Question 25
Which of the following does not belong to the same homologous series?
(a) CH4
(b) C2H6
(c) C3H8
(d) C4H8

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Solution

The answer is (d) C4H8.

A homologous series is a series of compounds with the same general formula, usually varying by a CH2 group. In the given list of compounds methane, ethane and propane belong to the same homologous series of compounds and butene does not.

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