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Question

In which of the following complexes, nickel is in the highest oxidation state?

A
K4[Ni(CN)4]
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B
[K2NiF6]
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C
[Ni(CO)4]
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D
[Ni(CN)4]2
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Solution

The correct option is B [K2NiF6]
Nickel has + 4 oxidation state.

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