Which one of the following complexes is not e | vedclass

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(C) The complex $[Ni(NH_3)_2Cl_2]$ adopts a tetrahedral geometry because $Ni^{2+}$ is a $d^8$ ion and $NH_3$ and $Cl^-$ are weak field ligands in this

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$[Ni(NH_3)_2Cl_2]$

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(C) The complex $[Ni(NH_3)_2Cl_2]$ adopts a tetrahedral geometry because $Ni^{2+}$ is a $d^8$ ion and $NH_3$ and $Cl^-$ are weak field ligands in this context,leading to $sp^3$ hybridization.Tetrahedral complexes of the type $[M(A)_2(B)_2]$ do not exhibit geometric isomerism because all positions in a tetrahedron are equivalent relative to each other.In contrast,$[Pt(NH_3)_2Cl_2]$ is a square planar complex which exhibits cis-trans isomerism.$[Ni(NH_3)_4(H_2O)_2]^{2+}$ is an octahedral complex which exhibits geometric isomerism.$[Ni(en)_3]^{2+}$ is an octahedral complex which exhibits optical isomerism.

Which one of the following complexes is not expected to exhibit isomerism?

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Which of the following complexes will show coordination isomerism?
$A. [Ag(NH_3)_2][Ag(CN)_2]$
$B. [Co(NH_3)_6][Cr(CN)_6]$
$C. [Co(NH_3)_6][Co(CN)_6]$
$D. [Fe(NH_3)_6][Co(CN)_6]$
$E. [Co(NH_3)_6][Fe(CN)_6]$
Choose the correct answer from the options given below:

Among $VO_2^{+}$,$MnO_4^{-}$ and $Cr_2O_7^{2-}$,the spin-only magnetic moment value of the species with least oxidising ability is $BM$ (Nearest integer). (Given atomic number $V=23$,$Mn=25$,$Cr=24$)

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