The correct order of increasing field strength of ligands is:

1. ${\mathrm{SCN}}^{-\hspace{0.17em}}<\hspace{0.17em}{\mathrm{F}}^{-\hspace{0.17em}}<\hspace{0.17em}{\mathrm{CN}}^{-\hspace{0.17em}}<\hspace{0.17em}{\mathrm{C}}_2{\mathrm{O}}_4^{2-}$

2. ${\mathrm{F}}^{-\hspace{0.17em}}<\hspace{0.17em}{\mathrm{SCN}}^{-\hspace{0.17em}}<\hspace{0.17em}{\mathrm{C}}_2{\mathrm{O}}_4^{2-\hspace{0.17em}}<\hspace{0.17em}{\mathrm{CN}}^{-}$

3. ${\mathrm{CN}}^{-\hspace{0.17em}}<\hspace{0.17em}{\mathrm{C}}_2{\mathrm{O}}_4^{2-\hspace{0.17em}}<\hspace{0.17em}{\mathrm{SCN}}^{-\hspace{0.17em}}<\hspace{0.17em}{\mathrm{F}}^{-}$

4. ${\mathrm{SCN}}^{-\hspace{0.17em}}<\hspace{0.17em}{\mathrm{F}}^{-\hspace{0.17em}}<\hspace{0.17em}{\mathrm{C}}_2{\mathrm{O}}_4^{2-\hspace{0.17em}}<\hspace{0.17em}{\mathrm{CN}}^{-}$

A complex has a molecular formula MSO₄Cl.6H₂O. Its aqueous solution gives white precipitate with barium chloride solution and no precipitate is obtained when it is treated with silver nitrate solution.

If the secondary valence of the metal is six, the correct representation of the complex is:

1. [M(H₂O)₄Cl]SO₄.2H₂O
2. [M(H₂O)₆]SO₄  
3. [M(H₂O)₅Cl]SO₄.H₂O
4. [M(H₂O)₃Cl]SO₄.3H₂O

The chemical formula for tris(ethane-1,2-diamine)iron(II) phosphate is: 
1. [Fe(CH₃-CH(NH₂)₂)₃](PO₄)₃  
2. [Fe(H₂N-CH₂-CH₂-NH₂)₃](PO₄) 
3. [Fe(H₂N-CH₂-CH₂-NH₂)₃](PO₄)₂  
4. [Fe(H₂N-CH₂-CH₂-NH₂)₃]₃(PO₄)₂

The correct electronic configuration of the central atom in ${\mathrm{K}}_4\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_6\right]$  based on crystal field theory is:

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

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⁺