Among the following species,the one which causes the highest $CFSE, \Delta _0$ as a ligand is

Correct increasing order for the wavelength of absorption in the visible region for the complexes of $Co^{3+}$ is :

Which of the following are true about the energy of the given d-orbitals of a tetrahedral complex?
$A$. $d_{xy} = d_{xz} > d_{x^2-y^2}$
$B$. $d_{xy} = d_{yz} > d_{z^2}$
$C$. $d_{x^2-y^2} > d_{z^2} > d_{xz}$
$D$. $d_{x^2-y^2} = d_{z^2}$
Choose the correct answer from the given below:

Crystal field stabilization energy for complex $[Co(CN)_6]^{3-}$ will be

The number of complexes from the following with no electrons in the $t_{2g}$ orbital is: $TiCl_4, [MnO_4]^{-}, [FeO_4]^{2-}, [FeCl_4]^{-}, [CoCl_4]^{2-}$

The order of absorption wavelength in the visible region for the following complexes is: