Question

The coordination number and oxidation state of Cr in K₃Cr(C₂O₄)₃ are respectively

(a) 3 and +3

(b) 3 and 0

(c) 6 and +3

(d) 4 and +2

Answer 1

Correct option (c) 6 and +3

Explanation :

As the number of atoms of the ligands that are directly bound to the central metal is known as coordination number. It is six here (see in figure).

Oxidation state :

Let oxidation state of Cr be x.