JEE Main & Advanced Sample Paper JEE Main - Mock Test - 21

  • question_answer
    2-Methylbutane on reacting with bromine in the presence of sunlight gives mainly

    A) 1-hromo-3-methylbutane

    B) 2-bromo-3-methyibutane

    C) 2-bromo-2-methyibutane

    D) 1-bromo-2-methyibutane

    Correct Answer: C

    Solution :

    \[C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,H-C{{H}_{2}}-C{{H}_{3}}\xrightarrow[sunlight]{B{{r}_{2}}}\underset{\text{2-Bromo-2-methyl}\,\,\text{butane}}{\mathop{C{{H}_{3}}-\underset{Br}{\mathop{\underset{|}{\mathop{\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-C{{H}_{2}}C{{H}_{3}}}}\,\]Ease of replacement of H-atom \[3{}^\circ >2{}^\circ >1{}^\circ .\]


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