Which of the following forms a homologous series ?

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Ethane, ethylene acetylene

Ethane, Propane, Butanone

Methanal, ethanol, propanoic acid

Butane, 2-methylbutane, 2,3-dimethyl -butane

answer is D.

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Detailed Solution

Given data : It is given to identify which of the following forms a homologous series.

Explanation

A homologous series is a group of substances that have some chemical characteristics but have some functional groups that are different from one another by CH₂.Butane, 2-methylbutane, 2,3-dimethyl -butane are all alkanes and hence belongs to the same homologous series.

Hence, the correct option (D) . Butane, 2-methylbutane, 2,3-dimethyl -butane

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