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JEE Main levelSingle correct optionDifficulty 2 of 3nm095

The IUPAC name of is:

  1. A2-oxopentanal
  2. B4-formylbutan-2-one
  3. C5-oxopentan-2-al
  4. D4-oxopentanal

Answer: D

The aldehyde outranks the ketone, so the chain is numbered from the CHO carbon (C-1) and includes five carbons. The ketone is on C-4 and is cited as oxo. The name is 4-oxopentanal.
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