The correct statement among the following is:

1.	If ∆0 < P, low spin state is more stable.
2.	CO is a very weak ligand.
3.	The colour of a complex depends only on the nature of the metal ion.
4.	CO is a weak base but a strong ligand.

The complex that does not have a tetrahedral shape is:

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

2. $\left[Ni{\left(CO\right)}_4\right]$

3. ${\left[NiC{l}_4\right]}^{2-}$                     

4. ${\left[Zn{\left(N{H}_3\right)}_4\right]}^{2+}$

The complex that contains only one unpaired electron is:

1. [CoF₆]^3-

2. [Co(C₂O₄)₃]^3-

3. [Fe(CN)₆]^3-

4. [MnCl₆]^3-

Total geometrical isomers possible for [Pd²⁺(NH₂-CH(CH₃)-CO₂^-)₂]⁰ are -

1. 2

2. 3

3. 4

4. 6

Isomerism exhibited by [Co(EDTA)]^- is/are:
 

1. Optical & geometrical isomerism.

2. Geometrical isomerism.

3. Optical isomerism.

4. No isomerism is exhibited by [Co(EDTA)]^-

1. [Co(en)₃][Cr(C₂O₄)₃]
2. [Cu(NH₃)₄][CuCl₄]
3. [Ni(en)₃][Co(NO₂)₆]

Which of the following complex ions is Bronsted-Lowry acid?

1. [Cu(NH₃)₄]²⁺

2. [FeCl₄]^-

3. [Fe(H₂O)₆]³⁺

4. [Zn(OH)₄]^2-

How many unpaired electrons are present in the complex ion [Cr(NH₃)₆]³⁺?

The correct order of energies of d-orbitals of metal ions in a square planar complex is:

1. ${\mathrm{d}}_{\mathrm{xy}}={\mathrm{d}}_{\mathrm{yz}}={\mathrm{d}}_{\mathrm{zx}}>{\mathrm{d}}_{{\mathrm{x}}^2-{\mathrm{y}}^2}={\mathrm{d}}_{{\mathrm{z}}^2}$

2. ${\mathrm{d}}_{{\mathrm{x}}^2-{\mathrm{y}}^2}={\mathrm{d}}_{{\mathrm{z}}^2}>{\mathrm{d}}_{\mathrm{xy}}={\mathrm{d}}_{\mathrm{yz}}={\mathrm{d}}_{\mathrm{zx}}$

3. ${\mathrm{d}}_{{\mathrm{x}}^2-{\mathrm{y}}^2}>{\mathrm{d}}_{{\mathrm{z}}^2}>{\mathrm{d}}_{\mathrm{xy}}>{\mathrm{d}}_{\mathrm{yz}}={\mathrm{d}}_{\mathrm{zx}}$

4. ${\mathrm{d}}_{{\mathrm{x}}^2-{\mathrm{y}}^2}>{\mathrm{d}}_{\mathrm{xy}}>{\mathrm{d}}_{{\mathrm{z}}^2}>{\mathrm{d}}_{\mathrm{zx}}={\mathrm{d}}_{\mathrm{yz}}$

[CoCl₂(NH₃)₄]⁺ + Cl^- → [CoCl₃(NH₃)₃] + NH₃
If in the above reaction, only one isomer of the product is obtained, then which of the following statement is true for the initial (reactant) complex?

1. Compound is in cis form.

2. Compound is in trans form.

3. compound is in both (cis and trans) forms.

4. Can't be predicted.