The IUPAC name of CH2=CH-CH2-CO-Cl is:

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The IUPAC name of $CH X_{2} = CH - CH X_{2} - CO - Cl$ is:

Abut-3-enoic chloride
B1-chlorobut-3-en-1-one
Cbut-3-enoyl chloride
D4-chlorobut-1-ene

Answer: C

An acyl chloride is named from the acid: the acyl carbon is C-1 and the double bond is C-3=C-4, so the acid is but-3-enoic acid. Replacing -oic acid by -oyl and adding chloride as a separate word gives but-3-enoyl chloride.

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The IUPAC name of CHX2​=CH−CHX2​−CO−Cl is:

Answer: C

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The IUPAC name of $CH X_{2} = CH - CH X_{2} - CO - Cl$ is: