A) \[C{{u}_{2}}C{{l}_{2}}\] and \[NiCl_{4}^{2-}\]
B) \[C{{u}_{2}}C{{l}_{2}}\] and \[NiCl_{4}^{2-}\]
C) \[CoF_{6}^{3-}\] and \[TiF_{6}^{2-}\]
D) \[TiF_{6}^{2-}\] and \[C{{u}_{2}}C{{l}_{2}}\]
Correct Answer: D
Solution :
Among the given, \[C{{u}^{+}}\] in \[(C{{u}_{2}}C{{l}_{2}})\] and \[T{{i}^{4+}}(in\,TiF_{6}^{2-})\] have no unpaired electrons. So, no d-d transition is possible. Hence, these two are colourless species.
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