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12th Class Chemistry Haloalkanes and Haloarenes / हैलोएल्केन तथा हैलोएरीन्स Question Bank MCQs - Haloalkanes and Haloarenes

  • question_answer
    Study the following reaction.
    \[{{C}_{2}}{{H}_{5}}OH+SOC{{l}_{2}}\xrightarrow[Pyridine]{}{{C}_{2}}{{H}_{5}}Cl+S{{O}_{2}}+HCl\]
    The above reaction is also known as

    A) Kharasch effect

    B) Darzen's process

    C) Williamson's synthesis

    D) Hunsdieker synthesis reaction

    Correct Answer: A

    Solution :

    [a]
    Alcohol reacts with \[SOC{{l}_{2}}\] in presence of pyridine to produce alkyl halide along with sulphur dioxide and hydrochloric acid. Pyridine is added to neutralise the effect of acid.
    \[{{C}_{2}}{{H}_{5}}OH+SOC{{l}_{2}}\xrightarrow{Pyridine}{{C}_{2}}{{H}_{5}}Cl+S{{O}_{2}}\uparrow +\,HCl\]
    This reaction is Darzen’s process.


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