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NEET Sample Paper NEET Sample Test Paper-90

  • question_answer
    The major product of the following reaction is: \[C{{H}_{3}}\underset{Br}{\mathop{\underset{|}{\mathop{C}}\,}}\,HC{{H}_{2}}\underset{Br}{\mathop{\underset{|}{\mathop{C}}\,}}\,HC{{H}_{2}}C{{H}_{3}}\xrightarrow[heat]{KOH,C{{H}_{3}}OH}\]

    A) \[C{{H}_{2}}=CHC{{H}_{2}}CH=CHC{{H}_{3}}\]

    B) \[C{{H}_{2}}=CHCH=CHC{{H}_{2}}C{{H}_{3}}\]

    C) \[C{{H}_{3}}CH=C=CHC{{H}_{2}}C{{H}_{3}}\]

    D)  \[C{{H}_{3}}CH=CH-CH=CHC{{H}_{3}}\]

    Correct Answer: D

    Solution :

    [d] \[C{{H}_{3}}-\underset{Br}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C{{H}_{2}}-\underset{Br}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C{{H}_{2}}-C{{H}_{3}}\] \[\xrightarrow[E2]{KOH,\,\,C{{H}_{3}}OH\,\,\Delta }\] \[C{{H}_{3}}-CH=\underset{(Saytzeff\,\,product)}{\mathop{CH-CH=C{{H}_{2}}}}\,-C{{H}_{3}}\]


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