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Chemistry Question on Oxidation Number

The coordination number and oxidation state of ( in K3[Cr(C2O4)3]K_3[Cr(C_2O_4)_3] are respectively

A

6 and + 3

B

3 and 0

C

4 and + 2

D

3 and + 3

Answer

6 and + 3

Explanation

Solution

The coordination number will be 6 as it is bonded to three bi-dentate ligands. x+3(−2)+3(+1)x + 3 (- 2) + 3 ( + 1) = 0 i.e., xi.e.,\, x = + 3 (oxidation state)