2. Sample Papers
  3. NEET

NEET Sample Paper NEET Sample Test Paper-57

  • question_answer
    \[A{{g}^{+}}N{{H}_{3}}\,{{\left[ Ag(N{{H}_{3}}) \right]}^{7}}\] \[{{K}_{1}}=6.8\times {{10}^{-3}}\] \[{{\left[ Ag(N{{H}_{3}}) \right]}^{+}}+N{{H}_{3}}{{\left[ Ag{{(N{{H}_{3}})}_{2}} \right]}^{+}}\] \[{{K}_{2}}=6.8\times {{10}^{-3}}\] then the formation constant of \[{{\left[ Ag(N{{H}_{3}}) \right]}^{+}}\] is:

    A) \[1.08\times {{10}^{-7}}\]        

    B) \[1.08\times {{10}^{-5}}\]

    C) \[1.08\times {{10}^{-9}}\]       

    D) \[None\]

    Correct Answer: A

    Solution :

    [b] \[1.08\times {{10}^{-5}}\] As the reaction takes place in two steps. \[A{{g}^{+}}+N{{H}_{3}}{{[Ag\,(N{{H}_{3}})]}^{+}}\] \[{{[Ag\,(N{{H}_{3}})]}^{+}}+NH\,{{[Ag\,{{(N{{H}_{3}})}_{2}}]}^{+}}\] \[k={{k}_{1}}\times {{k}_{2}}\] \[=(6.8\times {{10}^{-3}})\times (1.6\times {{10}^{-3}})\] \[=10.8\times {{10}^{-6}}=1.08\times {{10}^{-5}}\]


You need to login to perform this action.
You will be redirected in 3 sec spinner