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NEET Chemistry Analytical Chemistry Question Bank Self Evaluation Test - Analytical Chemistry

  • question_answer
    The presence of magnesium is confirmed in the qualitative analysis by the formation of a white crystalline precipitate of

    A) \[Mg{{\left( HC{{O}_{3}} \right)}_{2}}\]           

    B) \[MgN{{H}_{4}}P{{O}_{4}}\]

    C) \[MgN{{H}_{4}}{{\left( HC{{O}_{3}} \right)}_{3}}\]

    D) \[MgC{{O}_{3}}\]

    Correct Answer: B

    Solution :

    [b] \[MgC{{l}_{2}}+N{{a}_{2}}HP{{O}_{4}}+N{{H}_{4}}OH\to \] \[\underset{white\text{ }ppt.}{\mathop{Mg(N{{H}_{4}})}}\,P{{O}_{4}}+2NaCl+{{H}_{2}}O\]


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