NEET Chemistry Coordination Chemistry Question Bank Self Evaluation Test - Co-ordination Compounds

  • question_answer
    Which of the following complexes have a maximum number of unpaired electrons?

    A) \[[Ni{{\left( CO \right)}_{4}}]\]

    B) \[{{[Co{{\left( N{{H}_{3}} \right)}_{4}}{{\left( N{{O}_{2}} \right)}_{2}}]}^{+}}\]

    C) \[{{\left[ Ag{{\left( CN \right)}_{2}} \right]}^{-}}\]

    D) \[{{\left[ CuB{{r}_{4}} \right]}^{2-}}\]

    Correct Answer: D

    Solution :

    [d] \[Ni{{(CO)}_{4}};{{\mu }_{eff}}=0\] \[{{[Co{{(N{{H}_{3}})}_{4}}{{(N{{O}_{2}})}_{2}}]}^{+}};{{\mu }_{eff}}=0\] \[\left[ Ag{{\left( CN \right)}_{2}} \right];{{\mu }_{eff}}=0\] \[{{[CuB{{r}_{4}}]}^{2-}};{{\mu }_{eff}}=1.732\,BM\]


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