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

  • question_answer
    The unpaired electrons in \[Ni{{\left( CO \right)}_{4}}\] are

    A) zero                  

    B) one  

    C) three                

    D) four

    Correct Answer: A

    Solution :

    [a] \[Ni{{\left( CO \right)}_{4}}.\]The O. S. of Ni is zero. Electronic configuration is \[\left[ Ar \right]3{{d}^{8}}4{{s}^{2}}4{{p}^{0}}\] . In presence of strong ligand CO the paring of electrons take place and electronic configuration will be\[\left[ Ar \right]3{{d}^{10}}4{{s}^{0}}4{{p}^{0}}\]. Hence unpaired electrons is zero.


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