Question

write the IUPAC name of CH3-CH=CH-COOH

Answer 1

Answer : but - 2- ene - oic  acid

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$CH_3 - CH =CH-COOH \\\\ but - 2 - en - oic acid$

three carbon atoms = prop

COOH is present = oic acid

double bond = ene

or  we can say propenoic acid .

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hope it helps :)

thanks:)

Answer 2

The answer o the question is

But-2-ene-1-oicacid