question_answer 67)

  The IUPAC name for \[C{{H}_{3}}-\overset{\overset{\text{O}}{\mathop{\text{ }\!\!|\!\!\text{  }\!\!|\!\!\text{ }}}\,}{\mathop{C}}\,-C{{H}_{2}}-C{{H}_{2}}-\overset{\overset{\text{O}}{\mathop{\text{ }\!\!|\!\!\text{  }\!\!|\!\!\text{ }}}\,}{\mathop{C}}\,-OH\]is : (a) 1-hydroxypentane-1, 4-dione                             (b) 1, 4-dioxopentanol (c) 1-carboxybutan-3-one                                            (d) 4-oxopentanoic acid

Answer:

(d) -COOH is the principal functional group and \[-\overset{\overset{\text{O}}{\mathop{\text{ }\!\!|\!\!\text{  }\!\!|\!\!\text{ }}}\,}{\mathop{C}}\,(Oxo)\]group is present at position 4.