The structure of $[Cu(H_2O)_4]^{2+}$ ion is

Which of the following metal carbonyl complexes is correctly matched with its magnetic property and geometry?

For octahedral $Mn(II)$ and tetrahedral $Ni(II)$ complexes,consider the following statements:
$(I)$ Both the complexes can be high spin.
$(II)$ $Ni(II)$ complex can very rarely be low spin.
$(III)$ With strong field ligands,$Mn(II)$ complexes can be low spin.
$(IV)$ Aqueous solution of $Mn(II)$ ions is yellow in color.

Select the incorrect match.

The hybridization of the central metal ion in $[CoF_6]^{3-}$ is ....

Which of the following is an outer orbital complex? (Atomic numbers: $Mn = 25, Fe = 26, Co = 27, Ni = 28$)