Q7 of 33 Page 223

IUPAC name of the first member of alkyne is ___________ . (ethene / ethyne)

ethyne

Explanation: Alkyne is an unsaturated hydrocarbon.


i. The unsaturated hydrocarbons containing carbon to carbon triple bond are called alkynes.


ii. Alkynes are named by replacing suffix of alkane with “-yne”.


iii. The first member of alkane is ethane.


iv. Thus, the first member of alkyne is named as ethyne.


Note: The unsaturated hydrocarbons are those which contain carbon to carbon double bonds C=C or carbon to carbon triple bonds -CΞC- in their molecules.


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