All of the following are the members of the same homologous series, except

C_{4} H_{8}

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C_{5} H_{10}

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C_{3} H_{6}

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C_{5} H_{8}

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Solution

The correct option is D $C_{5} H_{8}$
The compounds $C_{3} H_{6}, C_{4} H_{8}$ and $C_{5} H_{10}$ have the general formula $C_{n} H_{2 n}$ with values of $n$ as $3, 4$ and $5$ respectively. Therefore, they belong to the same homologous series, i.e. alkenes.
However, $C_{5} H_{8}$ has the general formula $C_{n} H_{2 n - 2}$ with the value of $n$ as $5$ and therefore, it belongs to the homologous series of alkynes.
Hence, the correct answer is option (d).

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