1.

In [(H_(2)O)_(4)Co-(O-O)-Co (H_(2)O)_(4)] CL_(5) complex, Co has t_(2g)^(6)e_(g^(0)) configuration, this complex is :

Answer»

diamagnetic
PARAMAGNETIC
oxidation STATE of `CO` is `+2`
NONE of these

Solution :`O_(2)^(-)` is paramagnetic.


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