JEE Main & Advanced Sample Paper JEE Main - Mock Test - 39

  • question_answer
    One mole of magnesium nitride on reaction with an excess of water gives

    A) one mole of \[N{{H}_{3}}\]       

    B) two moles of \[N{{H}_{3}}\]

    C) one mole of \[HN{{O}_{3}}\]    

    D) two moles of \[HN{{O}_{3}}\]

    Correct Answer: B

    Solution :

    \[\underset{1\,\,mol}{\mathop{{{\operatorname{Mg}}_{3}}{{N}_{2}}}}\,+\underset{(excess)}{\mathop{6{{H}_{2}}O}}\,\,\,\to \,\,3Mg{{(OH)}_{2}}+\underset{2\,\,mol}{\mathop{2N{{H}_{3}}}}\,\]

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