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⁺

A low spin complex of $d^6$-cation in an octahedral field will have the following energy:

1.   $\frac{-12}{5}{∆}_0+3P$

2.  $\frac{-2}{5}{∆}_0+2P$

3.  $\frac{-2}{5}{∆}_0+P$

4.  $\frac{-12}{5}{∆}_0+P$

(${∆}_0$ = Crystal field splitting energy in an octahedral field, P = Electron pairing energy)

A red precipitate is obtained when an ethanol solution of dimethylglyoxime is added to ammoniacal Ni(II).
Which of the following statements is not true?

1.  Complex has symmetrical H-bonding.
2.  Red complex has a tetrahedral geometry.
3.  Dimethylglyoxime functions as a bidentate ligand.
4.  Red complex has a square planar geometry.

In a quantitative analysis of second group in the lab, H2S gas is passed in an acidic medium for ppt. When Cu+2 and Cd+2 react with KCN, then in which of the following conditions will a precipitate not be formed due to relative stability:
 

A complex compound is formed by ligands nitrate and chloride. It gives two moles of AgCl precipitate with AgNO₃.$$
 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:

Magnesium(Mg) is present in which of the following?

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