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AMU Medical AMU Solved Paper-2003

  • question_answer
    Mg on heating to redness in an atmosphere of \[{{N}_{2}}\] and then on treating with \[{{H}_{2}}O\] gives

    A)  \[N{{H}_{3}}\]                 

    B)  \[{{N}_{2}}\]

    C)  \[P{{H}_{3}}\]                  

    D)  MgO

    Correct Answer: A

    Solution :

                     When magnesium is heated to redness in an atmosphere of nitrogen then magnesium nitride is formed. \[3Mg+{{N}_{2}}\xrightarrow{{}}\underset{magnesium\text{ }nitride}{\mathop{M{{g}_{3}}{{N}_{2}}}}\,\]and when magnesium nitride is treated with water it gives ammonia. \[M{{g}_{3}}{{N}_{2}}+6{{H}_{2}}O\xrightarrow{{}}3Mg{{(OH)}_{2}}+2N{{H}_{3}}\]


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