TG EAMCET 4 May 2025 Shift 1 Paper

The atomic number of C0 is 27 . Its electronic configuration is [Ar]3d24s2. In [Co(ox)3]3−, the oxidation state of Co is +3 .
In the presence of C2O42− (strong field ligand in case of Co3+ ) pairing of electrons takes place.
[Co(ox)3]3−=It has no unpaired electron, so it is diamagnetic.