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 d-orbitals, which are stabillized in an octahedral magnetic field, are:

Options

A. `d_(xy) and d_(x^(2))`
B. `d_(x^(2)-y^(2)) and d_(x^(2))`
C. `d_(xy),d_(xz) and d_(yz)`
D. `d_(x^(2))` only

Answer

C