BCECE Engineering BCECE Engineering Solved Paper-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 :

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


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