TS EAMCET 5 May 2018 Shift 1 Solved Paper

In the octahedral complex of Cr( CO)6,CO is astrong ligand.
So, the complex formed is of low spin.
Cr(z=24)[Ar]3d54s1
In the presence of CO pairing occurs and the configuration becomes as follows.
Cr(z=24)[Ar]3d64s0
The electronic configuration of Cr in Cr(CO)6 can be shown as follows. The configuration is t2g6eg0.