Select the alkyne from the following :

C_{4} H_{8}

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C_{5} H_{8}

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C_{7} H_{19}

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None of these

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Solution

The correct option is B $C_{5} H_{8}$
Alkane - $C_{n} H_{2 n + 2}$
Alkene - $C_{n} H_{2 n}$
Alkyene - $C_{n} H_{2 n - 2}$
so
$C_{5} H_{8}$ is alkyne.

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Classify the following compounds as alkanes, alkenes and alkynes. [3 MARKS]

$C_{5} H_{1} 2$ , $C_{2} H_{4}$ , $C_{3} H_{4}$ , $C_{3} H_{8}$ , $C_{4} H_{8}$ , $C_{5} H_{8}$

C_{5} H_{8}

Number of isomeric alkynes of C₅H₈ is

Number of possible alkynes with formula $C_{5} H_{8}$ is

C_{5} H_{8}

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