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

1.	Linkage	2.	Co-ordination
3.	Ionization	4.	Geometrical

The species that are colourless:

(Z of Ti = 22, Co=27, Cu = 29, Ni= 28)

1. ${\mathrm{TiF}}_6^{2-}$ $\mathrm{and}$ ${\mathrm{CoF}}_6^{3-}$

2. ${\mathrm{Cu}}_2{\mathrm{Cl}}_2$ $\mathrm{and}$ ${\mathrm{NiCl}}_4^{2-}$

3. ${\mathrm{TiF}}_6^{2-}$ $\mathrm{and}$ ${\mathrm{Cu}}_2{\mathrm{Cl}}_2$

4. ${\mathrm{CoF}}_6^{3-}$ $\mathrm{and}$ ${\mathrm{NiCl}}_4^{2-}$

The correct order of increasing field strength of ligands is:

1. ${\mathrm{SCN}}^{- }< {\mathrm{F}}^{- }< {\mathrm{CN}}^{- }< {\mathrm{C}}_2{\mathrm{O}}_4^{2-}$

2. ${\mathrm{F}}^{- }< {\mathrm{SCN}}^{- }< {\mathrm{C}}_2{\mathrm{O}}_4^{2- }< {\mathrm{CN}}^{-}$

3. ${\mathrm{CN}}^{- }< {\mathrm{C}}_2{\mathrm{O}}_4^{2- }< {\mathrm{SCN}}^{- }< {\mathrm{F}}^{-}$

4. ${\mathrm{SCN}}^{- }< {\mathrm{F}}^{- }< {\mathrm{C}}_2{\mathrm{O}}_4^{2- }< {\mathrm{CN}}^{-}$

The crystal field stabilization energies (CFSE) of high spin and low spin $d^6$ metal complexes in terms of ${∆}_0$, respectively are: 

1.  -0.4 and -2.4

2.  -2.4 and -0.4

3.  -0.4 and 0.0

4.  -2.4 and 0.0

Which among the following complexes can exhibit isomerism?

The existence of two different coloured complexes with the composition of [Co(NH₃)₄Cl₂]⁺  is due to:

The complex ion among the following that cannot absorb visible light is:

1. [Ni(CN)₄]^2-

2. [Cr(NH₃)₆]³⁺

3. [Fe(H₂O)₆]²⁺

4. [Ni(H₂O)₆]²⁺

Which among the following is a diamagnetic complex?

1. ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$

2. ${\left[{\mathrm{CuCl}}_4\right]}^{2-}$

3. ${\left[{\mathrm{CoF}}_6\right]}^{3-}$

4. ${\left[{\mathrm{NiCl}}_4\right]}^{2-}$

A paramagnetic ion among the following, forms an outer orbital complex is:

1. $\left[Ni\right(N{H}_3{)}_6{]}^{2+}$

2. $\left[Zn\right(N{H}_3{)}_6{]}^{2+}$

3. $\left[Cr\right(N{H}_3{)}_6{]}^{3+}$

4. $\left[Co\right(N{H}_3{)}_6{]}^{3+}$