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Question

The IUPAC name of the CH3COCH2COOH is:

A
3-ketobutanoic acid
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B
2-ketobutanoic acid
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C
4-ketobutanoic acid
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D
3-oxopropanoic acid
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Solution

The correct option is A 3-ketobutanoic acid
In the compound both ketone and the carboxylic group is present. Priority is given to carboxylic group at C-1, and the ketonic group at C-3 is treated as a substituent. Thus the prefix used is "keto" and the suffix used is "oic acid".
Thus IUPAC name is 3-ketobutanoic acid

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