JEE Main & Advanced Chemistry Alcohols, Phenols and Ethers / एल्कोहॉल, फीनॉल तथा ईथर Question Bank Properties of alcohol Phenol and Ethers

  • question_answer
    The alcohol that produces turbidity immediately with \[ZnC{{l}_{2}}+\] conc. HCl at room temperature [EAMCET 1997; MP PMT 1989, 99; IIT JEE 1981, 86; CBSE PMT 1989; CPMT 1989;MP PET 1997; JIPMER 1999]

    A)                 1-hydroxybutane

    B)                 2-hydroxybutane

    C)                 2-hydroxy-2-methylpropane     

    D)                 1-hydroxy-2-methylpropane

    Correct Answer: C

    Solution :

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


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