NEET Sample Paper NEET Sample Test Paper-9

  • question_answer Lassaigne's test for the detection of nitrogen fails in

    A)  \[{{H}_{2}}N-CO-NHN{{H}_{2}}.HCl\]

    B)  \[N{{H}_{2}}-N{{H}_{2}}.HCl\]

    C)  \[N{{H}_{2}}-CO-N{{H}_{2}}\]

    D)  \[{{C}_{6}}{{H}_{5}}CON{{H}_{2}}\]

    Correct Answer: B

    Solution :

    Lassaigne's test is given by those nitrogenous compound in which carbon is also present along with nitrogen, (organic compound only). In \[N{{H}_{2}}.N{{H}_{2}}.HCl\] carbon is absent so it does not give Lassaigne's test.

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