A) \[{{[Mn{{O}_{4}}]}^{-}}\]
B) \[{{\left[ Cr{{\left( CN \right)}_{6}} \right]}^{3-}}\]
C) \[C{{r}_{2}}{{O}_{3}}\]
D) \[Cr{{O}_{2}}C{{l}_{2}}\]
Correct Answer: D
Solution :
[d] \[Cr{{O}_{2}}C{{l}_{2}}\] Let O. No. of \[Cr=x\] \[\therefore \text{ }x+2\left( -2 \right)+2\left( -1 \right)=0\] \[x-4-2=0\] \[\therefore \text{ }x=+6\]
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