The total number of possible isomers for $[Cu^{II}(NH_3)_4] [Pt^{II}Cl_4]$ is..........

What is the magnetic moment of $[FeF_6]^{3-}$ (in $BM$)?

Which of the following complexes will not show optical isomerism?

The spin-only magnetic moment value of an octahedral complex among $CoCl_{3} \cdot 4NH_{3}$,$NiCl_{2} \cdot 6H_{2}O$ and $PtCl_{4} \cdot 2HCl$,which upon reaction with excess of $AgNO_{3}$ gives $2$ moles of $AgCl$ is $....$ $B.M.$ (Nearest Integer)

Arrange the following in order of increasing number of unpaired electrons in them:
$i$. $[Fe(CN)_6]^{3-}$
$ii$. $[MnCl_6]^{3-}$
$iii$. $[FeF_6]^{3-}$
$iv$. $[Co(NH_3)_6]^{3+}$

Which of the following compounds will show optical isomerism?