The hybridization of $Ag^+$ in the linear complex $[Ag(NH_3)_2]^+$ is

$Cu^{2+}$ shows a coordination number of

$[Ni(PPh_3)_2Cl_2]$ is a paramagnetic complex. Identify the $INCORRECT$ statements about this complex.
$A$. The complex exhibits geometrical isomerism.
$B$. The complex is white in colour.
$C$. The calculated spin-only magnetic moment of the complex is $2.84 \ BM$.
$D$. The calculated $CFSE$ (Crystal Field Stabilization Energy) of $Ni$ in this complex is $-0.8 \Delta_0$.
$E$. The geometrical arrangement of ligands in this complex is similar to that in $Ni(CO)_4$.
Choose the correct answer from the options given below:

In the tetrahedral complex $K_2[NiCl_4]$,what is the number of electrons present in the $3d$ orbital of the central metal ion?

If an iron $(III)$ complex with the formula $[Fe(NH_3)_{x}(CN)_{y}]^{-}$ has no electron in its $e_g$ orbital, then the value of $x+y$ is

Why is $[CoF_6]^{3-}$ considered an outer orbital complex?