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Nomenclature of Carbonyls

Question

The IUPAC name of the given compound is :

4-hydroxy-2-pentanone
2-hydroxy-4-pentanone
4-keto-2-pentanol
2-oxo-4-pentanol

A

4-hydroxy-2-pentanone

B

2-hydroxy-4-pentanone

C

2-oxo-4-pentanol

D

4-keto-2-pentanol

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Solution

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The IUPAC name of the given compound is 4-hydroxy-2-pentanone.
The parent compound contains 5 $C$ atoms and a carbonyl group.
Hence, it is derivative of pentanone.
A $- O H$ group is present on fourth $C$ atom.
Hence, it is named as a prefix of 4-hydroxy. The numbering is done from the end which gives the $C$ atom of carbonyl group the lowest locant.

Hence, the correct option is $A$

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