NEET Sample Paper NEET Sample Test Paper-72

  • question_answer
    The alcohol that produces turbidity immediately with \[ZnC{{l}_{2}}+conc.\] HCl at room temperature

    A) 1 -hydroxybutane

    B) 2-hydroxybutane

    C) 2-hydroxy-2-methylpropane

    D) 1-hydroxy-2-methylpropane

    Correct Answer: C

    Solution :

    \[{{(C{{H}_{3}})}_{3}}C-OH+HCl\xrightarrow{Anhyd.\,ZnC{{l}_{2}}+\,HCl}\] \[{{(C{{H}_{3}})}_{3}}C-Cl+{{H}_{2}}O\,\,3{}^\circ \] reacts immediately \[{{(C{{H}_{3}})}_{2}}CH\,\,\,-\,\,\,OH\,\,\,\,+\,\,\,HCl\,\,\xrightarrow{Anhyd\,\,ZnC{{l}_{2}}\,\,+\,\,HCl}\] \[{{(C{{H}_{3}})}_{2}}CH-Cl\,\,+\,\,{{H}_{2}}O\,\,2{}^\circ \] reacts after 5 min \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}-OH+HCl\,\,\xrightarrow{Anhyd-ZnC{{l}_{2}}+HCl}\] \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}\,\,-\,\,\,Cl\,\,+\,\,{{H}_{2}}O\,\,1{}^\circ \] reacts only on heating.


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