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NEET Sample Paper NEET Sample Test Paper-18

  • question_answer
    AgCl is dissolved in excess of each of \[\text{N}{{\text{H}}_{\text{3}}}\text{, KCN}\]and\[N{{a}_{2}}{{S}_{2}}{{O}_{3}}.\]The complex ions produced in each case are

    A) \[{{[Ag{{(N{{H}_{3}})}_{2}}]}^{2+}},{{[Ag{{(CN)}_{2}}]}^{3-}}\]and\[{{[Ag{{({{S}_{2}}{{O}_{3}})}_{2}}]}^{2-}}\]

    B) \[{{[Ag{{(N{{H}_{3}})}_{2}}]}^{+}},{{[Ag{{(CN)}_{2}}]}^{3-}}\]and\[{{[Ag{{({{S}_{2}}{{O}_{3}})}_{2}}]}^{2-}}\]

    C) \[{{[Ag{{(N{{H}_{3}})}_{2}}]}^{+}},{{[Ag{{(CN)}_{2}}]}^{-}}\]and\[{{[Ag{{({{S}_{2}}{{O}_{3}})}_{2}}]}^{3-}}\]

    D) \[{{[Ag{{(N{{H}_{3}})}_{4}}]}^{2+}},{{[Ag{{(CN)}_{2}}]}^{3-}}\]and\[{{[A{{g}_{2}}{{({{S}_{2}}{{O}_{3}})}_{2}}]}^{2-}}\]      

    Correct Answer: C

    Solution :

    \[AgCl+2N{{H}_{4}}OH\to [Ag{{(N{{H}_{3}})}_{2}}]Cl+2{{H}_{2}}O\] \[AgCl+2KCN\to K[Ag{{(CN)}_{2}}]+KCl\] \[AgCl+N{{a}_{2}}{{S}_{2}}{{O}_{3}}\to N{{a}_{3}}[Ag{{({{S}_{2}}{{O}_{3}})}_{2}}]+NaCl\] Hence, the correct option is [c].


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