In a particular isomer of $[Co(NH_3)_4Cl_2]^0$,the $Cl-Co-Cl$ angle is $90^\circ$. This isomer is known as:

The spin-only magnetic moment of $Ni^{2+}$ in an aqueous solution in Bohr magneton $(\mu_B)$ is .......

Select the correct statement$(s)$ regarding the $[Ni(DMG)_2]$ complex compound.

Which of the following compounds is diamagnetic?

The complex(es),which can exhibit the type of isomerism shown by $[Pt(NH_3)_2 Br_2]$,is(are) [en $= H_2 NCH_2 CH_2 NH_2$ ]
$(A)$ $[Pt(en)(SCN)_2]$
$(B)$ $[Zn(NH_3)_2 Cl_2]$
$(C)$ $[Pt(NH_3)_2 Cl_4]$
$(D)$ $[Cr(en)_2(H_2 O)(SO_4)]^{+}$

The types of isomerism shown by $[Cr(NH_3)_5NO_2]Cl_2$ are: