RAJASTHAN PMT Rajasthan - PMT Solved Paper-2004

  • question_answer
    Hinsbergs reagent is used to distinguish between:

    A)  \[{{1}^{o}}\] and \[{{2}^{o}}\] amines

    B)  \[{{2}^{o}}\] and \[{{3}^{o}}\] amines

    C) (a) & (b)

    D)  none of these

    Correct Answer: C

    Solution :

    Hinsbergs reagent (benzene sulphonyl chloride) is used to distinguish between \[{{1}^{o}},\]\[{{2}^{o}}\] and \[{{3}^{o}}\] amines. \[{{1}^{o}}\,\text{amines+H}\text{.R}\text{.}\xrightarrow[{{H}_{2}}O]{NaOH}colourless\]                 \[solution\xrightarrow{acidified}\text{insoluble}\] \[{{2}^{o}}\,\text{amines+H}\text{.R}\text{.}\xrightarrow[{{H}_{2}}O]{NaOH}\text{insoluble}\]                                 \[\xrightarrow{acidified}\text{insoluble}\] \[{{3}^{o}}\text{amines+H}\text{.R}\text{.}\xrightarrow[{{H}_{2}}O]{NaOH}\text{insoluble}\]                                 \[\xrightarrow{acidified}colourless\,solution\]


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