The number of bridging carbonyl groups in [Co₂(CO)₈] and [Mn₂(CO)₁₀], respectively are
1. 2 and 0
2. 2 and 2
3. 2 and 4
4. 0 and 2

Which one of the following is the correct order of spin-only magnetic moment for the given complexes? 
1. \([Co(H_2O)_6]^{2+} > [MnCl_6]^{3-} > [Fe(CN)_6]^{3-} \)
2. \([Fe(CN)_6]^{3-} >[Co(H_2O)_6]^{2+} > [MnCl_6]^{3-} \)
3. \([MnCl_6]^{3-} >[Fe(CN)_6]^{3-} >[Co(H_2O)_6]^{2+} \)
4. \([MnCl_6]^{3-} > [Co(H_2O_6]^{2+} > [Fe(CN)_6]^{3-} \)

Ethylene diaminetetraacetate (EDTA) ion is:

Which of the following is the correct order of increasing field strength of ligands?

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

Urea reacts with water to form A which will decompose to form B. B when passed through ${\mathrm{Cu}}^{2+}$ (aq), deep blue color solution C is formed. What is the formula of C from the following? 

1. ${\left[\mathrm{Cu}{\left({\mathrm{NH}}_3\right)}_4\right]}^{2+}$

2.  $\mathrm{Cu}{\left(\mathrm{OH}\right)}_2$

3.  ${\mathrm{CuCO}}_3.\mathrm{Cu}{\left(\mathrm{OH}\right)}_2$

4.   ${\mathrm{CuSO}}_4$

What is 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?

1.  ${\mathrm{e}}^4 {\mathrm{t}}_{2\mathrm{g}}^{ 2}$

2.  ${\mathrm{t}}_{2\mathrm{g}}^{ 4} {\mathrm{e}}_{\mathrm{g}}^2$

3.  ${\mathrm{t}}_{2\mathrm{g}}^{ 6} {\mathrm{e}}_{\mathrm{g}}^0$

4.  ${\mathrm{e}}^3 {\mathrm{t}}_{2\mathrm{g}}^{ 3}$

The crystal field stabilization energy (CFSE) for [CoCl₆]^{4 -} is 18000 cm^-1.    What will be the CFSE for [CoCl₄]^2-  

1. $6000 c{m}^{-1}$

2. $16000 c{m}^{-1}$

3. $18000 c{m}^{-1}$

4. $8000 c{m}^{-1}$