Two isomers X and Y with the formula Cr(H₂O)₅ClBr₂ were taken for an experiment on depression in the freezing point. It was found that one mole of X gave depression corresponding to 2 moles of particles and one mole of Y gave depression due to 3 moles of particles. The structural formula of X and Y respectively, are: 

1. [Cr(H₂O)₅Cl] Br₂; [Cr(H₂O)₄Br₂]Cl.H₂O

2. [Cr(H₂O)₅Cl] Br₂; [Cr(H₂O)₃ClBr₂].2H₂O

3. [Cr(H₂O)₅Br]BrCl; [Cr(H₂O)₄ClBr]Br.H₂O

4. [Cr(H₂O)₄Br₂]ClH₂O; [Cr(H₂O)₅Cl]Br₂

Identify the outer orbital complex among the following options.
(Atomic number Mn=25, Fe=26, Co=27, Ni=28)

1. [Fe(CN)₆]^4-

2. [Mn(CN)₆]^4-

3. [Co(NH₃)₆]³⁺

4. [Ni(NH₃)₆]²⁺

For a ${\mathrm{d}}^4$ metal ion in an octahedral field, the correct electronic configuration is:

Given below are two statements :

1. Statement I is false but Statement II is true.

2. Both Statement I and Statement II are false.

3. Statement I is true but Statement II is false.

4. Both Statement I and Statement II are true.

Ethylene diaminetetraacetate (EDTA) ion is:

Optical isomerism is exhibited by among the following is/are:

The correct splitting diagram of d orbitals in an octahedral crystal field is:

1.		2.
3.		4.	None of these.

$1.$ ${\mathrm{K}}_2\left[\mathrm{Cr}{\left({\mathrm{C}}_2{\mathrm{O}}_4\right)}_3\right]$
$2.$ ${\mathrm{K}}_3\left[\mathrm{Cr}{\left({\mathrm{C}}_2{\mathrm{O}}_4\right)}_3\right]$
$3.$ ${\mathrm{K}}_3\left[\mathrm{Cr}{\left({\mathrm{C}}_2{\mathrm{O}}_4\right)}_2\right]$
$4.$ ${\mathrm{K}}_2\left[\mathrm{Cr}{\left({\mathrm{C}}_2{\mathrm{O}}_4\right)}_4\right]$

[Cr(NH₃)₆]³⁺ is paramagnetic ,while ${\left[\mathrm{Ni}{\left(\mathrm{CN}\right)}_4\right]}^{2-}$ is diamagnetic because: