When degenerate d-orbitals of an isolated atom/ion come under influence of magnetic field of ligands, the degeneray is lost. The two set t_(2g)(d_(xy),d_(yz),d_(xz)) and e_(g) (d_(x^(2))-d_(x^(2)-y^(2)) are either stabilized or destabilized depending upon the nature of magnetic field. it can be expressed diagrammatically as: Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for tetrahedral complexes, Delta is about 4/9 times to Delta_(0) (CFSE for octahedral complex). this energy lies in visible region and i.e., why electronic transition are responsible for colour. such transition are not possible with d^(0) and d^(10) configuration. Q. The extent of crystal field splitting in octahedral complexes of the given metal with particular weak field ligand are:

When degenerate d-orbitals of an isolated atom/ion come under influenc

1.	When degenerate d-orbitals of an isolated atom/ion come under influence of magnetic field of ligands, the degeneray is lost. The two set t_(2g)(d_(xy),d_(yz),d_(xz)) and e_(g) (d_(x^(2))-d_(x^(2)-y^(2)) are either stabilized or destabilized depending upon the nature of magnetic field. it can be expressed diagrammatically as: Value of CFSE depends upon nature of ligand and a spectrochemical series has been made experimentally, for tetrahedral complexes, Delta is about 4/9 times to Delta_(0) (CFSE for octahedral complex). this energy lies in visible region and i.e., why electronic transition are responsible for colour. such transition are not possible with d^(0) and d^(10) configuration. Q. The extent of crystal field splitting in octahedral complexes of the given metal with particular weak field ligand are:
Answer» `Fe(III) lt Cr(III) lt RH(III) lt Ir(III)` `Cr(III) lt Fe(III) lt (Rh(III) lt Ir( III)` `Ir(III) lt Rh(III) lt Fe(III) lt Cr(III)` `Fe(III)=Cr(III)ltRh(III)ltIr(III)` ANSWER :A