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JEEMAIN and NEET
>>
Chemistry
>>
d-and-f-Block Elements
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Q)
The oxidation state of Ni in
N
i
(
C
O
)
4
is
(
a
)
I
I
(
b
)
0
(
c
)
I
I
I
(
d
)
V
I
I
I
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