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The IUPAC name of the compound CH3CH=CHC≡CH is

1. Pent-1-yn-3-ene
2. Pent-4-yn-2-ene
3. Pent-3-en-1-yne
4. Pent-2-en-4-yne

Correct answer: Pent-1-yn-3-ene

Solution

The compound has both a double bond and a triple bond. The numbering starts from the end closer to the double bond, giving the name Pent-1-yn-3-ene.

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