JEE Main & Advanced Chemistry Haloalkanes and Haloarenes / हैलोएल्केन तथा हैलोएरीन्स Question Bank Critical Thinking Haloalkanes

  • question_answer
    In which one of the following conversions phosphorus pentachloride is used as a reagent [EAMCET 1997]

    A) \[{{H}_{2}}C=C{{H}_{2}}\to C{{H}_{3}}C{{H}_{2}}Cl\]

    B) \[{{H}_{3}}C-O-C{{H}_{3}}\to C{{H}_{3}}Cl\]

    C) \[C{{H}_{3}}C{{H}_{2}}OH\to C{{H}_{3}}C{{H}_{2}}Cl\]

    D) \[HC\equiv CH\to C{{H}_{2}}=CHCl\]

    Correct Answer: B

    Solution :

     \[C{{H}_{3}}-O-C{{H}_{3}}+PC{{l}_{5}}\to 2C{{H}_{3}}Cl+POC{{l}_{3}}\] \[C{{H}_{3}}C{{H}_{2}}OH+PC{{l}_{5}}\to C{{H}_{3}}C{{H}_{2}}Cl+HCl+POC{{l}_{3}}\] So, both reaction carried out by \[PC{{l}_{5}}\]


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