BCECE Medical BCECE Medical Solved Papers-2005

  • question_answer
    When calomel reacts with \[N{{H}_{4}}OH\] solution the compound formed is :

    A) \[N{{H}_{2}}=Hg-Cl\]

    B)  \[H{{g}_{2}}C{{l}_{2}}N{{H}_{3}}\]

    C)  \[Hg{{(N{{H}_{3}})}_{2}}C{{l}_{2}}\]

    D)  \[HgC{{l}_{2}}N{{H}_{3}}\]

    Correct Answer: A

    Solution :

    \[HgC{{l}_{2}}+2N{{H}_{3}}\xrightarrow{{{H}_{2}}O}\]                 \[Hg+\underset{\begin{smallmatrix}  mercuric \\  amino\text{ }chloride \end{smallmatrix}}{\mathop{N{{H}_{2}}HgCl}}\,\,\,+N{{H}_{4}}Cl\] \[\therefore \] \[HgC{{l}_{2}}\] on reaction with \[N{{H}_{4}}OH\] (or\[N{{H}_{3}}+{{H}_{2}}O\])  forms mercuric amino chloride.


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