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JEE Main & Advanced Chemistry Coordination Chemistry Question Bank Hybridisation and Geometry

  • question_answer
    One mole of the complex compound \[Co{{(N{{H}_{3}})}_{5}}C{{l}_{3}},\] gives 3 moles of ions on dissolution in water. One mole of the same complex reacts with two moles of \[AgN{{O}_{3}}\] solution to yield two moles of \[AgCl\,(s)\]. The structure of the complex is [AIEEE 2003]

    A) \[[Co{{(N{{H}_{3}})}_{5}}Cl]\,C{{l}_{2}}\]

    B) \[[Co{{(N{{H}_{3}})}_{3}}C{{l}_{3}}].\,2N{{H}_{3}}\]

    C) \[[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]\,Cl\,.\,N{{H}_{3}}\]

    D) \[[Co{{(N{{H}_{3}})}_{4}}Cl]\,C{{l}_{2}}.\,N{{H}_{3}}\]

    Correct Answer: A

    Solution :

    \[2C{{l}^{-}}\] ions are ionizable \[\therefore \,\left[ Co{{(N{{H}_{3}})}_{5}}Cl \right]C{{l}_{2}}\] ⇌ \[\underbrace{{{[Co{{(N{{H}_{3}})}_{5}}Cl]}^{\,2+}}+2C{{l}^{-}}}_{3\text{ ions}}\] \[2C{{l}^{-}}+2AgN{{O}_{3}}\to 2AgCl+2NO_{3}^{-}\].


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