Which of the following sets of complexes is`//` are correct with respect to the properties indicated against each ?

Options

A. `[V(CO)_(6)],K_(4)[Mn(CN)_(6)],Cs_(2)[CuF_(6)]-` Low spin octahedral complex with one unparied electron.
B. `K_(2)[NiCl_(4)],[NiCl(PPh_(3))_(3)],[NiCl_(2)(PPh_(3))_(2)]`- Tetrahedral geometry containing two unparied electrons.
C. `Cs[CuF_(4)],[Cu(NH_(3))_(4)](NO_(3))_(2),K_(3)[Cu(CN)_(4)]-` Square planar geometry and diamagnetic.
D. `K_(4)[Fe(CN)_(6)],[Fe(H_(2)O)_(5)NO]SO_(4),Na_(4)[Fe(CN)_(5)NO]-` Diamagnetic having `+2` oxidation state of central metal atom.

Answer

1

Explanation

`(1)` `[V(CO)_(6)]-d^(2)sp^(3)` containing one electron `(d^(5))`.
`K_(4)[Mn(CN)_(6)],-d^(2)sp^(3)` containing one unpaired electron `(d^(5))`.
`[CuF_(6)]^(2-)-` It is a low spin octahedral complex with one unpaired electron `(d^(7))`
`(2)` `[NiCl_(4)]^(2-)` and `[NiCl_(2)(PPh_(3))_(2)]-sp^(3)` containing two unpaired electron `(d^(8))` .
`[NiCl(PPh_(3))_(2)-sp^(3)` containing one unpaired electron `(d^(9))`.
`(3)` `[CuF_(4)]^(-)-` diamagnetic planar complex with `d^(8)` configuration.
`[Cu(NH_(3))_(4)]^(2+)-` paramagnetic planar complex with `d^(9)` configuration.
`[Cu(CN)_(4)]^(3-)-` diamagnetic tetrahedral complex with `d^(10)` configuration.
`(4)` `[Fe(CN)_(5)]^(4-)-` diamagnetic with `+2` oxidation state of ion.
`[Fe(H_(2)O)_(5)NO^(+)]-` paramagnetic with `+1` oxidation state of ion.
`[Fe(CN)_(5)NO^(+)]^(2-)-` diamagnetic with `+2` oxidation state of ion.