Find the value of spin-only magnetic moment for $Zn^{2+}$ in $BM$.

Change in composition of the coordination sphere yields which type of isomers?

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.

The correct structures of trans-$[NiBr_{2}(PPh_{3})_{2}]$ and meridional-$[Co(NH_{3})_{3}(NO_{2})_{3}]$,respectively,are

Number of possible isomers for $[Cr(H_2O)_2(C_2O_4)_2]^{-}$ are . . . . . . .

Provide evidence that $[Co(NH_3)_5Cl]SO_4$ and $[Co(NH_3)_5SO_4]Cl$ are ionization isomers.