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Question

What is the oxidation state of central atom in [Ni(CN)4]2 ?

A
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B
1
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C
2
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D
3
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Solution

The correct option is C 2
[Ni(CO)4]2
Central atom =Ni
Oxidation state of CO in general =1
Applying formula, Sum of total oxidation state of all atoms = Overall charge on the compound.
Let oxidation state of Ni=xx+4(1)=2,x=+2
Oxidation state of Ni=+2.

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