In the coordination compound, oxidation state of nickel is
-1
0
+1
+2
As we have learned
Oxidation number of central metal atom -
The charge the central atom would carry if all the ligands are removed along with the electron pairs that are shared with the central atom.
-
+1*4+x-1*4=0
4+x-4=0 x=0for Ni
Option 1)
-1
Option 2)
0
Option 3)
+1
Option 4)
+2
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