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Manipal Engineering Manipal Engineering Solved Paper-2013

  • question_answer
    \[(A)+\]tap water\[\to \]white turbidity soluble in\[aq.N{{H}_{3}}\]                 \[(A)\xrightarrow{\Delta }residue(B)+N{{O}_{2}}+{{O}_{2}}\] Aqueous\[(A)\]gives brown ring on adding\[FeS{{O}_{4}}\]and\[Conc.{{H}_{2}}S{{O}_{4}}\].Identify\[(A)\].

    A) \[NaN{{O}_{3}}\]            

    B)        \[AgN{{O}_{3}}\]

    C) \[NaN{{O}_{2}}\]            

    D)        \[AgN{{O}_{2}}\]

    Correct Answer: B

    Solution :

    \[(A)\]\[+\]tap water\[\to \]white turbidity soluble in\[aq.N{{H}_{3}}\]. Tap water has\[C{{l}^{-}}\]and turbidity is soluble in\[aq\,\,N{{H}_{3}}\]. Turbidity is of\[AgCl\]and thus\[(A)\]has\[A{{g}^{+}}\] \[(A)\]also gives ring test of\[NO_{3}^{-}\] \[(A)\]has nitrate and thus\[(A)\]is\[AgN{{O}_{3}}\]


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