Which of the following is diamagnetic?

  • A
    $Zn^{2+}$
  • B
    $Ni^{2+}$
  • C
    $Co^{2+}$
  • D
    $Cu^{2+}$

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The spin-only magnetic moment of $[Mn(H_2O)_6]^{2+}$ complex is $........ \ B.M.$ (Nearest integer) (Given: Atomic number of $Mn$ is $25$)

Among the following,the compound that is both diamagnetic and coloured is

Match List $I$ with List $II$ :
List $I$ (Complex)List $II$ (Type of isomerism)
$A$. $[Pt(NH_3)_2Cl_2]$$I$. Optical
$B$. $[Co(en)_3]^{3+}$$II$. Solvate
$C$. $[Co(NH_3)_5NO_2]Cl_2$$III$. Geometrical
$D$. $[Cr(H_2O)_6]Cl_3$$IV$. Linkage

Choose the correct answer from the options given below :

The correct order of intensity of colors of the compounds is:

The complexes $[Co(NH_3)_5Br]SO_4$ and $[Co(NH_3)_5SO_4]Br$ can be distinguished by which of the following reagents?

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