IUPAC name of the first member of alkyne is ___________.

ethene

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ethyne

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ethane

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methane

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Solution

The correct option is B ethyne
Alkynes are carbon compounds with general formula $C_{n} H_{2 n - 2}$
The first member of alkyne series is $C_{2} H_{2}$ (ethyne)
$H - C \equiv C - H$
Alkyne series: $C_{2} H_{2}, C_{3} H_{4}, C_{4} H_{6}, C_{5} H_{8}$ .

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