VIT Engineering VIT Engineering Solved Paper-2011

  • question_answer
    The alcohol having molecular formula \[{{C}_{4}}{{H}_{9}}OH\], when shaken with a mixture of anhydrous \[ZnC{{l}_{2}}\] and cone. \[HCl\] gives an oily layer product after five minutes. The alcohol is

    A)  \[{{H}_{3}}C-{{(C{{H}_{2}})}_{3}}-OH\]

    B)  \[{{(C{{H}_{3}})}_{2}}CH-C{{H}_{2}}OH\]

    C)  \[{{(C{{H}_{3}})}_{3}}C-OH\]

    D)  \[{{H}_{3}}C-CH(OH)C{{H}_{2}}-C{{H}_{3}}\]

    Correct Answer: D

    Solution :

     Secondary alcohol, on reaction with anhydrous \[ZnC{{l}_{2}}\] and cone. \[HCl\] (Lucas reagent) gives an oily layer product after five minutes. \[\underset{OH}{\mathop{\underset{|}{\mathop{{{H}_{3}}C-CH-C{{H}_{2}}C{{H}_{3}}}}\,}}\,\xrightarrow{\begin{smallmatrix}  Lucas \\  reagent \end{smallmatrix}}\] oily layer product (turbidity) after 5 min.


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