Question

WHAT IS THE IUPAC NAME OF CH2(DOUBLE BOND)CH(SINGLE BOND)CH2(SINGLE BOND)COOH ?

Answer 1

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$CH_2 = CH - CH_2 - COOH$

⏩IUPAC NAME :-

But-3-ene-Carboxylic acid

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Answer 2

I think it must be propanoic acid
CH2=CH=CH2-COOH
ie,CH3CH2COOH