The total number of possible isomers for $[Pt(NH_3)_4Cl_2]Br_2$ is . . . . . . .

Which one of the following coordination complexes exhibits the lowest value of magnetic moment (in $BM$)?

The correct increasing order of spin-only magnetic moment values of the complex ions $[MnBr_{4}]^{2-}$ $(A)$, $[Cu(H_{2}O)_{6}]^{2+}$ $(B)$, $[Ni(CN)_{4}]^{2-}$ $(C)$ and $[Ni(H_{2}O)_{6}]^{2+}$ $(D)$ is:

For the correct assignment of electronic configuration of a complex,the valence bond theory often requires the measurement of

The spin-only magnetic moment of $[ZCl_{4}]^{2-}$ is $3.87 \, BM,$ where $Z$ is $.....$

Which one of the following complex ions has geometrical isomers?