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JEE Main levelSingle correct optionDifficulty 2 of 3nm092

The IUPAC name of $CH X_{3} - CH (Cl) - CH X_{2} - COOH$ is:

A1-chlorobutan-3-oic acid
B3-chlorobutanal
C2-chlorobutanoic acid
D3-chlorobutanoic acid

Answer: D

The COOH carbon is C-1 and the chain has four carbons. Chlorine sits on C-3, a halogen is only a prefix. The name is 3-chlorobutanoic acid.

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