The isomerism displayed by K₃[Co(NO₂)₆] and K₃[Co(ONO)₆] is: 

The complexes [CO(NH₃)₆][Cr(CN)₆] and [Cr(NH₃)₆][Co(CN)₆] are examples of:

The complex that can exhibit linkage isomerism is:

Optical isomerism is exhibited by among the following is/are:

The geometry and the number of the unpaired electron(s) of \([MnBr_{4}]^{2-}\), respectively, are:

The ionization isomer of [Cr(H₂O)₄Cl(NO₂)]Cl is:

The compound that gives a pair of enantiomorphs is:
(en = NH₂ CH₂CH₂ NH₂)

1. $\left[Co\right(N{H}_3{)}_{4}C{l}_2]N{O}_2$

2. $\left[Cr\right(N{H}_3{)}_6\left]\right[Co\left(CN{)}_6\right]$

3. $\left[Co\right(en{)}_{2}C{l}_2]Cl$

4. $\left[Pt\right(N{H}_3{)}_4\left]\right[PtC{l}_6]$

[Co(NH₃)₄(NO₂)₂]Cl can show:

[Cr(H₂O)₆]Cl₃ and [Cr(H₂O)₅Cl₂]Cl.H₂O are examples of: