Coordination Compounds - Result Question 23

####25. Oxidation number of $Ni$ in $[Ni(C_2 O_4)_3]^{4}$ is

(a) 3

(b) 4

(c) 2

(d) 6

[2001]

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Solution:

(c) O.N. of $Ni$ in $[Ni(C_2 O_4)_3]^{4-}$

$ =x+3(-2)=-4 \Rightarrow x=-4+6=2 $



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