In the nitroprusside ion,the iron exists as $Fe^{2+}$ and $NO$ as $NO^{+}$ rather than $Fe^{3+}$ and $NO$ respectively. These forms of ions are established with the help of

The spin-only magnetic moment of $Fe^{2+}$ ion (in $BM$) is approximately

The complex,$[Pt(Py)(NH_3)BrCl]$,will have how many geometrical isomers?

Calculate the total number of stereoisomers for the octahedral complex $[Fe(F)(Cl)(Br)(I)(NH_3)(H_2O)]^-$.

Given below are two statements:
Statement-$I$ : The number of paramagnetic species among $[CoF_6]^{3-}$, $[TiF_6]^{3-}$, $V_2O_5$ and $[Fe(CN)_6]^{3-}$ is $3$.
Statement-$II$ : $K_4[Fe(CN)_6] < K_3[Fe(CN)_6] < [Fe(H_2O)_6]SO_4 \cdot H_2O < [Fe(H_2O)_6]Cl_3$ is the correct order in terms of number of unpaired electron$(s)$ in the complexes.
In the light of the above statements, choose the correct answer from the options given below.

Explain stereoisomerism in coordination compounds.