The isomer(s) of $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right]$ that has/have a $\mathrm{Cl}-\mathrm{Co}-\mathrm{Cl}$ angle of $90^{\circ}$, is/are

The coordination number of Th in $\mathrm{K}_4\left[\mathrm{Th}\left(\mathrm{C}_2 \mathrm{O}_4\right)_4\left(\mathrm{OH}_2\right)_2\right]$ is $\left(\mathrm{C}_2 \mathrm{O}_4^{2-}=\right.$ Oxalato $)$

The correct order of the spin-only magnetic moments of the following complexes is :
(I) $\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Br}_2$
(II) $\mathrm{Na}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$
(III) $\mathrm{Na}_3\left[\mathrm{Fe}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]\left(\Delta_0>\mathrm{P}\right)$
(IV) $...

The Crystal Field Stabilization Energy $(\mathrm{CFSE})$ of $\left[\mathrm{CoF}_3\left(\mathrm{H}_2 \mathrm{O}\right)_3\right]\left(\Delta_0<\mathrm{P}\right)$ is

The one that can exhibit highest paramagnetic behaviour among the following is gly = glycinato; bpy = 2, 2'-bipyridine

The number of bridging CO ligand(s) and Co -Co bond(s) in $\mathrm{Co}_2(\mathrm{CO})_8$, respectively are:

Among (a) - (d), the complexes that can display geometrical isomerism are
(a) $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}\right]^{+}$
(b) $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right) \mathrm{Cl}_5\right]^{-}$
(c) $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}\left(\mathrm{NO}_2\right)\right]$
...

Complex A has a composition of $\mathrm{H}_{12} \mathrm{O}_6 \mathrm{Cl}_3 \mathrm{Cr}$. If the complex on treatment with conc. $\mathrm{H}_2 \mathrm{SO}_4$ loses $13.5 \%$ of its original...

The d-electron configuration of $\left[\mathrm{Ru}(\mathrm{en})_3\right] \mathrm{Cl}_2$ and $\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_2$ , respectively are

The correct order of the calculated spin-only magnetic moments of complexes (A) to (D) is
(A) $\mathrm{Ni}(\mathrm{CO})_4$ (B) $\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_2$
(C) $\mathrm{Na}_2\left[\mathrm{Ni}(\mathrm{CN})_4\right]$...