Question

Out of ${\left[Fe\right(CN{)}_6]}^{4-},{\left[Ni\right(CN{)}_4]}^{2-}$:

Select the incorrect statement(s):

• A. all have identical geometry.
• B. all are paramagnetic.
• C. all are diamagnetic.
• D. ${\left[Fe\right(CN{)}_6]}^{4-}$ is diamagnetic but ${\left[Ni\right(CN{)}_4]}^{2-}$ and $\left[Ni{\left(CO\right)}_4\right]$ are paramagnetic.

Answer 1

Answer: (A), (B), (D)

The correct options are
A all have identical geometry.
B all are paramagnetic.
D ${\left[Fe\right(CN{)}_6]}^{4-}$ is diamagnetic but ${\left[Ni\right(CN{)}_4]}^{2-}$ and $\left[Ni{\left(CO\right)}_4\right]$ are paramagnetic.

Both are diamagnetic but do not have identical geometry.