WB JEE Medical WB JEE Medical Solved Paper-2011

  • question_answer
    Among the alkenes which one produces tertiary butyl alcohol on acid hydration?

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

    B)  \[C{{H}_{3}}CH=CHC{{H}_{3}}\]

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

    D)  \[C{{H}_{3}}-CH=C{{H}_{2}}\]

    Correct Answer: C

    Solution :

                     Iso-butylene directly add a molecule of water in presence of \[{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\]as catalyst to form tertiary butyl alcohol. \[\underset{\begin{smallmatrix}  Iso-butylene \\  (2-methylpropene) \end{smallmatrix}}{\mathop{C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,=C{{H}_{2}}}}\,\xrightarrow{{{H}^{+}}}C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\underset{+}{\overset{|}{\mathop{C}}}\,}}\,-C{{H}_{3}}\xrightarrow{{{H}_{2}}\underset{\centerdot \,\,\centerdot }{\overset{\centerdot \,\,\centerdot }{\mathop{O}}}\,}\]


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