The complex, $\left[\mathrm{Pt}\left(\mathrm{Py}\right)\left({\mathrm{NH}}_3\right)\mathrm{BrCl}\right]$ will have how many geometrical isomers?

1.  4

2.  0

3.  2

4.  3

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⁺

Crystal field stabilization energy for high spin d⁴ octahedral complex is

1. -1.8 ${∆}_0$

2. -1.6 ${∆}_0$+P

3. -1.2 ${∆}_0$

4. -0.6 ${∆}_0$

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

Which of the following complexes exhibits the highest paramagnetic behavior ? 
where gly = glycine, en = ethylene Jiamine and bpy = bipyridyl moieties 
(At no : Ti= 22 V = 21! Fe = 26, Co = 27)

1.  ${\left[\mathrm{V}{\left(\mathrm{gly}\right)}_2{\left(\mathrm{OH}\right)}_2{\left({\mathrm{NH}}_3\right)}_2\right]}^{+}$

2.  ${\left[\mathrm{Fe}\left(\mathrm{en}\right) \left(\mathrm{bpy}\right) {\left({\mathrm{NH}}_3\right)}_2\right]}^{2+}$

3.  ${\left[\mathrm{Co}{\left(\mathrm{OX}\right)}_2{\left(\mathrm{OH}\right)}_2\right]}^{-}$

4.  ${\left[\mathrm{Ti}{\left({\mathrm{NH}}_3\right)}_6\right]}^{3+}$

In which of the following coordination entities the magnitude of \(\Delta_{oct}\)(CFSE in the octahedral field) will be maximum? 
(Atomic number Co = 27)

1.  ${\left[\mathrm{Co}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]}^{3+}$

2. [Co(NH₃)₆]³⁺

3.  ${\left[\mathrm{Co}{\left(\mathrm{CN}\right)}_6\right]}^{3-}$

4.  ${\left[\mathrm{Co}{\left({\mathrm{C}}_2{\mathrm{O}}_4\right)}_3\right]}^{3-}$

Which of the following will give a pair of enantiomorphs? 
(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 exhibits :

1. Linkage isomerism, ionization isomerism and optical isomerism

2. Linkage isomerism, ionization isomerism and geometrical isomerism

3. Ionization isomerism,geometrical isomerism and optical isomerism

4. Linkage isomerism, geometrical isomerism and optical isomerism