BHU PMT BHU PMT (Screening) Solved Paper-2008

  • question_answer
    Which one of the following has a square planar geometry?

    A)  \[{{[CoC{{l}_{4}}]}^{2-}}\]           

    B)  \[{{[FeC{{l}_{4}}]}^{2-}}\]

    C)  \[{{[NiC{{l}_{4}}]}^{2-}}\]                            

    D)  \[{{[PtC{{l}_{4}}]}^{2-}}\]

    Correct Answer: D

    Solution :

                     \[C{{l}^{-}}\]is a weak ligand but\[C{{l}^{-}}\]cause the pairing of electron with large\[P{{t}^{2+}}\]and consequently give\[ds{{p}^{2}}\]hybridisation and square planar geometry.


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