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  4. The IUPAC name of CH3-CH=CH-C≡ CH is

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Q. The IUPAC name of $CH_{3}-CH=CH-C\equiv CH$ is

NTA AbhyasNTA Abhyas 2022

Solution:

Using IUPAC rules this compound can be named as
$\underset{\text{Pent} - 3 - \text{en} - 1 - \text{yne}}{\overset{}{\overset{5}{\text{C}} \text{H}_{3} - \overset{4}{\text{C}} \text{H} = \overset{3}{\text{C}} \text{H} - \overset{2}{\text{C}} \equiv \overset{1}{\text{C}} \text{H}}}$
As here triple bond is at corner, so it is preferred over double bond for numbering.