1. Tardigrade
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  4. The IUPAC name of the compound having the formula CH≡ C-CH=CH2 is -

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Q. The $IUPAC$ name of the compound having the formula $CH\equiv C-CH=CH_2$ is -

AIPMTAIPMT 2009Organic Chemistry – Some Basic Principles and Techniques

Solution:

As triple bond is present at carbon no. 3 and double bond is present at carbon no. 1 so IUPAC name of compound is 1 - butene - 3- yne. In numbering double bond is given preference if from both side alkene and alkyne functional group are present at same numbers.
$\underset{\text{1-butene-3-yne}}{\overset{4}{CH} \equiv \overset{3}{C} - \overset{2}{CH} = \overset{1}{CH _{2}}}$