The geometry of the cuprammonium ion $[Cu(NH_3)_4]^{2+}$ is:

Which of the following statements are true about $[CoF_6]^{3-}$ ion?
$I$. The complex has octahedral geometry.
$II$. Coordination number of $Co$ is $3$ and oxidation state is $+6$.
$III$. The complex is $sp^3d^2$ hybridised.
$IV$. It is a high spin complex.

The geometries of the ammonia complexes of $Ni^{2+}$,$Pt^{2+}$ and $Zn^{2+}$,respectively,are

Which of the following compounds is diamagnetic and tetrahedral?

$[Mn(CO)_4 NO]$ is diamagnetic because

If $Hund's$ rule is violated,then select the $CORRECT$ statement regarding $[Ni(NH_3)_6]^{2+}$: