NEET Sample Paper NEET Sample Test Paper-7

  • question_answer
    Which of the following species does not exist?

    A)  \[{{[GeC{{l}_{6}}]}^{2-}}\]                    

    B)  \[{{[\text{SnC}{{\text{l}}_{\text{6}}}]}^{2-}}\]

    C)  \[{{[\text{SiC}{{\text{l}}_{\text{6}}}]}^{2-}}\]              

    D)  \[{{[CC{{l}_{6}}]}^{2-}}\]

    Correct Answer: D

    Solution :

    Due to non-availability of vacant d-orbitals carbon cannot accommodate electron pairs from \[C{{l}^{-}}\] ions and hence cannot expand its valence shell to form \[{{\left[ CC{{l}_{6}} \right]}^{2-}}\] -ion.


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