Which of the following change the colour of the aqueous solution of $FeCl_3$?

The colour of $CuCr_2O_7$ solution in water is green because

Which statement is wrong?

Select the correct statement$(s)$ regarding the $[Ni(DMG)_2]$ complex compound.

$A$ coordination compound has the formula $MCl_3 \cdot 4H_2O$. The coordination number of the metal is $6$,and it contains no water of hydration. How many $ml$ of $0.1 \, M \, AgNO_3$ are required to precipitate the chloride ions from $200 \, ml$ of a $0.01 \, M$ solution of this compound?

The sum of the total number of $Cr-O$ bonds in chromate $(CrO_4^{2-})$ and dichromate $(Cr_2O_7^{2-})$ ions is: