Find the value of x from the following Venn diagram if

In Venn diagram,

intersection of superset with subset is subset

S₁ : Generally square planar complexes show geometrical isomerism but do not exhibit optical isomerism because they do not possess planer of symmetry.
S₂ :
S₃ : In octahedral complexes each electron entering the t_2g orbitals stabilizes the complex ion by 0.4 and each electron entering the e.gorbital destabilizes the complex by an amount of 0.6 Δ₀.

All the following complex show decreases in their weights when placed in a magnetic balance then the group of complexes having tetrahedral geometry is :
i) Ni(CO)₄
ii) K[AgF₄ ]
iii) Na₂ [Zn(CN)₄ ]
iv) K₂ [PtCl₄ ]
v) [RhCl(PPh₃)₃ ]

complex A
complex B
A & B complexes have the co-ordination number 4.
The IUPAC name of complexes ‘A’ & ‘B’ are respectively :

On treatment of 100 mL 0.1 M Solution of CoCl3.6H2Owith excess AgNO₃, ions are precipitated The complex is :

How many EDTA (ethylenediaminetetraacetic acid) molecules are required to make an octahedral complex with a Ca2+ ion ?

In Fe(CO)₅, the Fe – C bond possesses :

When degenerate d-orbitals of an iSol. ated atom/ion come under influence of magnetic field of ligands, the degeneracy is lost The two set and are either stabilized or destrabilized depending upon the nature of magnetic fieldIt can be expressed diagrammatically as:
Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for is about 4/9 times to tetrahedral complexes, (CFSE for octahedral complex)This energy lies in visible region and i.e., why electronic transition are responsible for colour Such transitions are not possible with d0 and d10 configuration.
Crystal field stabilization energy for [in terms of parameter Dq is –

When degenerate d-orbitals of an iSolated atom/ion come under influence of magnetic field of ligands, the degeneracy is lost The two set and are either stabilized or destrabilized depending upon the nature of magnetic fieldIt can be expressed diagrammatically as:
Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for is about 4/9 times to tetrahedral complexes, (CFSE for octahedral complex)This energy lies in visible region and i.e., why electronic transition are responsible for colour Such transitions are not possible with d0 and d10 configuration.
is purple while is colourless because –

When degenerate d-orbitals of an iSolated atom/ion come under influence of magnetic field of ligands, the degeneracy is lost The two set and are either stabilized or destrabilized depending upon the nature of magnetic fieldIt can be expressed diagrammatically as:
Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for is about 4/9 times to tetrahedral complexes, (CFSE for octahedral complex)This energy lies in visible region and i.e., why electronic transition are responsible for colour Such transitions are not possible with d⁰ and d¹⁰ configuration.
For an octahedral complex, which of the following d-electron configuration will give maximum CFSE?

When degenerate d-orbitals of an iSolated atom/ion come under influence of magnetic field of ligands, the degeneracy is lost The two set and are either stabilized or destrabilized depending upon the nature of magnetic fieldIt can be expressed diagrammatically as: 
Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for is about 4/9 times to tetrahedral complexes, (CFSE for octahedral complex)This energy lies in visible region and i.e., why electronic transition are responsible for colour Such transitions are not possible with d⁰ and d¹⁰ configuration.
The d-orbitals, which are stabilised in an octahedral magnetic field, are –

hen degenerate d-orbitals of an iSolated atom/ion come under influence of magnetic field of ligands, the degeneracy is lost The two set and are either stabilized or destrabilized depending upon the nature of magnetic fieldIt can be expressed diagrammatically as:

Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for is about 4/9 times to tetrahedral complexes, (CFSE for octahedral complex)This energy lies in visible region and i.e., why electronic transition are responsible for colourSuch transitions are not possible with d⁰ and d¹⁰ configuration.
The CFSE for complex is 18000 cm^–1The for will be –

Double salts are addition compounds which lose their identity in aqueous Solution whereas complexes which are also addition compounds do not lose their identity in aqueous Solution. The coordination compounds show isomerism and find applications in photography, qualitative analysis, metallurgy, water purification and in the treatment of various diseases.
Which of the following statements is incorrect ?

Statement-I : EAN of Fe in ferrocene is 36
Statement-II : 6 e ^– are co-ordinated by each cyclo pentadien ring with central metal ion.

Which of the following ions are optically active?
I)
II)
III)
IV)