JEE Main & Advanced Chemistry The d-and f-Block Elements / d तथा f ब्लॉक के तत्व Question Bank Compounds of Transitional Elements

  • question_answer
    Amongst \[TiF_{6}^{2-},CoF_{6}^{3-},C{{u}_{2}}C{{l}_{2}}\] and \[NiCl_{4}^{2-}\] (Atomic number \[Ti=22,\] \[Co=27,\] \[Cu=29,\] \[Ni=28\]). The colourless species are [CBSE PMT 1995]

    A) \[CoF_{6}^{3-}\] and \[NiCl_{4}^{2-}\]

    B) \[TiF_{6}^{2-}\] and \[CoF_{6}^{3-}\]

    C) \[C{{u}_{2}}C{{l}_{2}}\] and \[NiCl_{4}^{2-}\]

    D) \[TiF_{6}^{2-}\] and \[C{{u}_{2}}C{{l}_{2}}\]

    Correct Answer: D

    Solution :

    \[TiF_{6}^{2-}\] and \[C{{u}_{2}}C{{l}_{2}}\] due to absence of unpaired electrons.


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