Question

Amongst $TiF_{6}^{2 -},CoF_{6}^{3 -},Cu_{2}Cl_{2}$ and $NiCl_{4}^{2 -}$ (Atomic number $Ti = 22,$ $Co = 27,$ $Cu = 29,$ $Ni = 28$).The colourless species are.

• A. $CoF_{6}^{3 -}$ and $NiCl_{4}^{2 -}$
• B. $TiF_{6}^{2 -}$ and $CoF_{6}^{3 -}$
• C. $Cu_{2}Cl_{2}$ and $NiCl_{4}^{2 -}$
• D. $TiF_{6}^{2 -}$ and $Cu_{2}Cl_{2}$

Answer 1

Answer: (D)

$TiF_{6}^{2 -}$ and $Cu_{2}Cl_{2}$

Answer 2

$TiF_{6}^{2 -}$ and $Cu_{2}Cl_{2}$ due to absence of unpaired electrons.