JEE Main & Advanced Chemistry Hydrocarbons / हाइड्रोकार्बन Question Bank Alkene

  • question_answer
    In a reaction \[C{{H}_{2}}=C{{H}_{2}}\underset{acid}{\mathop{\xrightarrow{\text{Hypochlorous}}}}\,M\xrightarrow{R}\begin{matrix}    C{{H}_{2}} & - & OH  \\    |\,\,\,\,\,\,\, & {} & {}  \\    C{{H}_{2}} & - & OH  \\ \end{matrix}\] Where M = molecule; R = reagent M and R are [CBSE PMT 1997; CPMT 2001]

    A) \[C{{H}_{3}}C{{H}_{2}}Cl\] and NaOH

    B) \[C{{H}_{2}}Cl-C{{H}_{2}}OH\] and \[\text{aq}\text{. }NaHC{{O}_{3}}\]

    C) \[C{{H}_{3}}C{{H}_{2}}OH\] and HCl

    D) \[C{{H}_{2}}=C{{H}_{2}}\] and heat

    Correct Answer: B

    Solution :

    \[C{{H}_{2}}=C{{H}_{2}}\xrightarrow{HOCl}\underset{\underset{Cl\,\,\,\,\,}{\mathop{|\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{2}}}}\,-\underset{\underset{OH\,\,}{\mathop{|\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{2}}}}\,\xrightarrow{aq\,NaHC{{O}_{3}}}\] \[\underset{\text{Glycol}}{\mathop{\underset{\underset{C{{H}_{2}}-OH}{\mathop{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,}{\mathop{C{{H}_{2}}-OH}}\,}}\,\]


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