The carbonyl compound with the strongest C-O bond is:

1. Fe(CO)₅

2. [Mn(CO)₆]⁺

3. Cr(CO)₆

4. [V(CO)₆]^-

Among the given complex, the complex having the highest paramagnetic behaviour is:
(At. No. Ti = 22, Cr = 24, Co = 27, Zn = 30)

1. ${\left[\mathrm{Zn}{\left({\mathrm{NH}}_3\right)}_6\right]}^{2+}$

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

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

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

Identify the complex among the following that is not expected to exhibit isomerism:
 

1. [Pt(NH₃)₂Cl₂]

2. [Ni(NH₃)₂Cl₂]

3. [Ni(en)₃]²⁺

4. [Ni(NH₃)₄(H₂O)₂]²⁺

Which one of the following pair represents stereoisomerism:

1. Linkage isomerism and Geometrical isomerism

2. Chain isomerism and Rotational isomerism

3. Optical isomerism and Geometrical isomerism

4. Structural isomerism and Geometrical isomerism

A complex compound is formed by ligands nitrate and chloride. It gives two moles of AgCl precipitate with $AgN{O}_3$. What will its formula be? 

1. $\left[Co{\left(N{H}_3\right)}_{5}N{O}_3\right]C{l}_2$

2. $\left[Co{\left(N{H}_3\right)}_{5}Cl\right]N{O}_{3}Cl$

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

4. $[Co{\left(N{H}_3\right)}_{4}ClN{O}_3]Cl$

The shape of Fe(CO)₅ is:

Which one of the following is expected to exhibit optical isomerism?
(en = ethylenediamine)

1. cis-[Pt(NH₃)₂Cl₂]  

2. cis-[Co(en)₂Cl₂]

3. trans−[Co(en)₂Cl₂]

4. trans−[Pt(NH₃)₂Cl₂]

Mg is present in:

Number of isomers of $[Pt$ ${\left(N{H}_3\right)}_4]$ $\left[CuC{l}_4\right]$ complex are:

The coordination compound that will give four isomers is:

1. [Fe(en)₃]Cl₃

2. [Co(en)₂Cl₂]Cl

3. [Fe(PPh₃)₃NH₃ClBr]Cl

4. [Co(PPh₃)₃Cl]Cl₃