Square Planar Complexes

Q.

The number of unpaired electrons in the $F{e}^{2+}$ ion is

1. 0

2. 4

3. 6

4. 3

Q.

The structure of BF${}_3$ is

1. Tetrahedral

2. Pyramidal

3. Planar triangular

4. T - shaped

Q.

Amongst $Ni(CO{)}_4,[Ni(CN{)}_4{]}^{2-}andNiC{l}_4^{2-}:$

1. $Ni(CO{)}_{4}andNiC{l}_4^{2-}$ are diamagnetic; and $\left[Ni\right(CN{)}_4{]}^{2-}$ is paramagnetic.

2. $\left[Ni\right(CN{)}_4{]}^{2-}andNiC{l}_4^{2-}$ are diamagnetic; and $Ni(CO{)}_4$ is paramagnetic.

3. $Ni\left(CO{)}_{4}and\right[Ni(CN{)}_4{]}^{2-}$ are diamagnetic; and $NiC{l}_4^{2-}$ is paramagnetic.

4. $Ni(CO{)}_{4}isdiamagnetic;[Ni(CN{)}_4{]}^{2-}$ and $NiC{l}_4^{2-}$ is paramagnetic.