J & K CET Engineering J and K - CET Engineering Solved Paper-2011

  • question_answer Which of the following is a correct name according to IUPAC rules?

    A)  2, 3-diethylhexane

    B)  3-ethyl-2-methylpentane

    C)  3, 4-dimethylpentane

    D)  2-ethyl-2-methylpentane

    Correct Answer: B

    Solution :

     3-ethyl-2-methyl pentane is a correct name according to IUPAC rules. \[\underset{3-\text{ethyl}-2-\text{methyl}\,\text{pentane}}{\mathop{\overset{5}{\mathop{C}}\,{{H}_{3}}-\overset{4}{\mathop{C}}\,{{H}_{2}}-\,\,\,\underset{C{{H}_{2}}C{{H}_{3}}}{\mathop{\underset{|}{\overset{3}{\mathop{CH}}}\,}}\,-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{2}{\mathop{CH}}}\,}}\,-\overset{1}{\mathop{C}}\,{{H}_{3}}}}\,\]

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