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

The pair in which both the species have the same magnetic moment (spin only) is

Which one of the following octahedral complexes will not show geometric isomerism ($A$ and $B$ are monodentate ligands)?

$[Co(NH_3)_5NO_2]Cl_2$ and $[Co(NH_3)_5(ONO)]Cl_2$ are related to each other as

Arrange the following coordination compounds in the increasing order of magnetic moments. (Atomic numbers: $Mn = 25$; $Fe = 26$)
$(A)$ $[FeF_{6}]^{3-}$
$(B)$ $[Fe(CN)_{6}]^{3-}$
$(C)$ $[MnCl_{6}]^{3-}$ (high spin)
$(D)$ $[Mn(CN)_{6}]^{3-}$

Which of the following is not correctly matched?