question_answer 75)

  Correct IUPAC name for \[{{H}_{3}}C-\underset{\underset{{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{CH}}\,-\underset{\underset{{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{CH}}\,-C{{H}_{3}}\]is:                 (a) 2-ethyl-3-methylpentane                                      (b) 3, 4-dimethylhexane (c) 2-sec-butylbutane                                                    (d) 2, 3-dimethylbutane

Answer:

  (b) Long chain contains six-carbon atoms.