Which of the following is NOT a valid name for the compound shown below?

Step-by-step solution

The given compound is CH ₃- C (= O )- CH ₃ . Its common names are Acetone and Dimethyl ketone. Its IUPAC name is Propanone (or Propan-2-one). The name '2-Oxoketone' is invalid because 'oxo' is used as a prefix when a higher priority functional group is present, and 'ketone' is a class name used in common naming (like dialkyl ketone), not as a suffix with 'oxo'. Answer: 2-Oxoketone