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Question

Oxidation state of central atom in Ni(CN)24 is :

A
2
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B
0
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C
+2
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D
+4
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Solution

The correct option is C +2
Let x be the oxidation state of nickel in Ni(CN)24.
The oxidation state of cyanide group is 1.
The sum of the oxidation states is equal to 2 which is the charge on the ion.
Therefore x+4(1)=2 or, x=+2
Hence, the oxidation state is +2.

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