JEE Main & Advanced Chemistry Hydrocarbons Question Bank Critical Thinking

  • question_answer Identify Z in the following series \[C{{H}_{2}}=C{{H}_{2}}\xrightarrow{HBr}X\xrightarrow{\text{Hydrolysis}}Y\underset{{{I}_{2}}\text{ excess}}{\mathop{\xrightarrow{N{{a}_{2}}C{{O}_{3}}}}}\,Z\] [AIIMS 1983; RPMT 1999]

    A) \[{{C}_{2}}{{H}_{5}}I\]

    B) \[{{C}_{2}}{{H}_{5}}OH\]

    C) \[CH{{I}_{3}}\]

    D) \[C{{H}_{3}}CHO\]

    Correct Answer: C

    Solution :

               \[C{{H}_{2}}=C{{H}_{2}}\xrightarrow{HBr}C{{H}_{3}}-\underset{\underset{Br\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{2}}}}\,\xrightarrow{\text{Hydrolysis}}\]\[C{{H}_{3}}-\underset{\underset{OH\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{2}}}}\,\underset{{{I}_{2}}\,\text{excess}}{\mathop{\xrightarrow{N{{a}_{2}}C{{O}_{3}}}}}\,\underset{\begin{smallmatrix}  \text{Yellow}\,\text{ppt} \\  \left( \text{Iodoform} \right) \end{smallmatrix}}{\mathop{\,CH{{I}_{3}}}}\,\]


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